CHUBB LTD, 10-K filed on 2/25/2021
Annual Report
v3.20.4
Document and Entity Information
$ in Billions
12 Months Ended
Dec. 31, 2020
SFr / shares
Feb. 11, 2021
shares
Jun. 30, 2020
USD ($)
Dec. 31, 2019
SFr / shares
Document Annual Report true      
Document Transition Report false      
Entity Address, Address Line One Baerengasse 32      
Entity Address, City or Town Zurich      
ICFR Auditor Attestation Flag true      
Common Shares, par value | SFr / shares SFr 24.15     SFr 24.15
Entity Common Stock, Shares Outstanding | shares   450,224,906    
Document Type 10-K      
Document Period End Date Dec. 31, 2020      
Entity File Number 1-11778      
Entity Registrant Name Chubb Ltd      
Entity Incorporation, State or Country Code V8      
Entity Tax Identification Number 98-0091805      
Entity Address, Country CH      
Entity Address, Postal Zip Code 8001      
Country Region 41      
City Area Code (0)43      
Local Phone Number 456 76 00      
Amendment Flag false      
Document Fiscal Year Focus 2020      
Document Fiscal Period Focus FY      
Entity Central Index Key 0000896159      
Current Fiscal Year End Date --12-31      
Entity Well-known Seasoned Issuer Yes      
Entity Voluntary Filers No      
Entity Current Reporting Status Yes      
Entity Interactive Data Current Yes      
Entity Filer Category Large Accelerated Filer      
Entity Small Business false      
Entity Emerging Growth Company false      
Entity Shell Company false      
Entity Public Float | $     $ 57  
Common Class A [Member]        
Title of 12(b) Security Common Shares, par value CHF 24.15 per share      
Trading Symbol CB      
Security Exchange Name NYSE      
INA Senior Notes Due December 2024 [Member]        
Title of 12(b) Security Guarantee of Chubb INA Holdings Inc. 0.30% Senior Notes due 2024      
Trading Symbol CB/24A      
Security Exchange Name NYSE      
INA Senior Notes Due June 2027 [Member]        
Title of 12(b) Security Guarantee of Chubb INA Holdings Inc. 0.875% Senior Notes due 2027      
Trading Symbol CB/27      
Security Exchange Name NYSE      
INA Senior Notes Due March 2028 [Member]        
Title of 12(b) Security Guarantee of Chubb INA Holdings Inc. 1.55% Senior Notes due 2028      
Trading Symbol CB/28      
Security Exchange Name NYSE      
INA Senior Notes Due December 2029 [Member]        
Title of 12(b) Security Guarantee of Chubb INA Holdings Inc. 0.875% Senior Notes due 2029      
Trading Symbol CB/29A      
Security Exchange Name NYSE      
INA Senior Notes Due June 2031 [Member]        
Title of 12(b) Security Guarantee of Chubb INA Holdings Inc. 1.40% Senior Notes due 2031      
Trading Symbol CB/31      
Security Exchange Name NYSE      
INA Senior Notes Due March 2038 [Member]        
Title of 12(b) Security Guarantee of Chubb INA Holdings Inc. 2.50% Senior Notes due 2038      
Trading Symbol CB/38A      
Security Exchange Name NYSE      
v3.20.4
Consolidated Balance Sheets
$ in Millions
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
USD ($)
shares
Assets    
Fixed maturities available for sale, at fair value, net of valuatuon allowance - $20 at December 31, 2010 (amortized cost – $85,188 and $82,580) $ 90,699 $ 85,488
Debt securities, held to maturity, net carrying value 11,653  
Debt Securities, Held-to-maturity 11,697 12,581
Equity Securities, at fair value 4,027 812
short-term investments amortized cost 4,349 4,291
Short-term investments, at fair value (amortized cost - $4,349 and $4,291) 4,345 4,291
Other investments, at fair value 7,945 6,062
Total investments 118,669 109,234
Cash 1,747 [1] 1,537 [2]
Restricted Cash 89 109
Securities lending collateral 1,844 994
Accrued investment income 867 867
Premium Receivable, Allowance for Credit Loss 44 44
Insurance and reinsurance balances receivable, net of valuation allowance - $44 and $44 10,480 10,357
Reinsurance Recoverable, Allowance for Credit Loss 314 316
Reinsurance recoverable on losses and loss expenses, net of valuation allowance - $314 and $316 [3] 15,592 15,181
Reinsurance recoverable on policy benefits 206 197
Deferred policy acquisition costs 5,402 5,242
Value of business acquired 263 306
Goodwill 15,400 15,296
Other intangible assets 5,811 6,063
Prepaid reinsurance premiums 2,769 2,647
Investments in partially-owned insurance companies 2,813 1,332
Other assets 8,822 7,581
Total assets 190,774 176,943
Liabilities    
Unpaid losses and loss expenses 67,811 62,690
Unearned premiums 17,652 16,771
Future policy benefits 5,713 5,373
Insurance and reinsurance balances payable 6,708 6,184
Securities lending payable 1,844 994
Accounts payable, accrued expenses, and other liabilities 14,052 12,214
Deferred Income Tax Liabilities 892 804
Repurchase agreements 1,405 1,416
Short-term debt 0 1,299
Long-term debt 14,948 13,559
Trust preferred securities 308 308
Total liabilities 131,333 121,612
Commitments and contingencies (refer to Note 10)
Shareholders' equity    
Common Shares (CHF 24.15 par value; 477,605,264 and 479,783,864 shares issued; 450,732,625 and 451,971,567 shares outstanding) 11,064 11,121
Common Shares in treasury (26,872,639 and 27,812,297 shares) (3,644) (3,754)
Additional Paid in Capital 9,815 11,203
Retained earnings 39,337 36,142
Accumulated other comprehensive income (AOCI) 2,869 619
Total shareholders' equity 59,441 55,331
Total liabilities and shareholders’ equity 190,774 176,943
Debt Securities, Available-for-sale, Allowance for Credit Loss 20 0
Fixed maturities available for sale, at amortized cost 85,188 82,580
Debt Securities, Held-to-maturity, Allowance for Credit Loss 44 0
Debt Securities, Held-to-maturity, Fair Value $ 12,510 $ 13,005
Common Shares, shares issued | shares 477,605,264 479,783,864
Common Shares, shares outstanding | shares 450,732,625 451,971,567
Treasury Stock, Shares | shares 26,872,639 27,812,297
[1] Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2020, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.
[2] Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information.
[3] Net of valuation allowance for uncollectible reinsurance.
v3.20.4
Consolidated Statements Of Operations and Comprehensive Income - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Revenues      
Net premiums written $ 33,820 $ 32,275 $ 30,579
Increase in unearned premiums (703) (985) (515)
Net premiums earned 33,117 31,290 30,064
Net investment income 3,375 3,426 3,305
Realized Investment Gains (Losses) (498) (530) (652)
Net realized gains (losses):      
Other-than-temporary impairment (OTTI) losses gross   (90) (52)
Portion of OTTI losses recognized in other comprehensive income (OCI) 0 32 3
Net OTTI losses recognized in income   (58) (49)
Net realized, Gain (Loss), Excluding Other-than-temporary Impairment Loss (498) (472) (603)
Total revenues 35,994 34,186 32,717
Expenses      
Losses and loss expenses 21,710 18,730 18,067
Policy benefits 784 740 590
Policy Acquisition Costs 6,547 6,153 5,912
Administrative expenses 2,979 3,030 2,886
Interest expense 516 552 641
Other (income) expense (994) (596) (434)
Amortization of Purchased Intangibles 290 305 339
Chubb integration expenses 0 23 59
Total expenses 31,832 28,937 28,060
Income before income tax 4,162 5,249 4,657
Income tax expense (includes benefit of $(36), nil, and $(41) on unrealized gains and losses reclassified from AOCI) 629 795 695
Net income 3,533 4,454 3,962
Other comprehensive income (loss)      
Unrealized appreciation (depreciation) 2,311 3,704 (2,298)
Reclassification adjustment for net realized (gains) losses included in net income 281 31 302
Other comprehensive income (loss) after reclassification for net realized gains included in net income 2,592 3,735 (1,996)
Change in:      
Cumulative foreign currency translation adjustment 306 13 (802)
Postretirement benefit liability adjustment (232) (76) (321)
Other comprehensive income (loss), before income tax 2,666 3,672 (3,119)
Income tax (expense) benefit related to OCI items (416) (605) 399
Other comprehensive income (loss) 2,250 3,067 (2,720)
Comprehensive income $ 5,783 $ 7,521 $ 1,242
Earnings per share      
Basic earnings per share $ 7.82 $ 9.77 $ 8.55
Diluted earnings per share $ 7.79 $ 9.71 $ 8.49
v3.20.4
Consolidated Statements of Operations and Comprehensive Income (Parenthetical) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income tax expense (benefit) $ 36 $ 0 $ 41
Reclassification out of Accumulated Other Comprehensive Income [Member] | AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]      
Net realized gains (losses) (281) (31) (302)
Income tax expense (benefit) $ (36) $ 0 $ (41)
v3.20.4
Consolidated Statements Of Shareholders' Equity - USD ($)
$ in Millions
Total
Common Shares
Common Shares in Treasury
Additional Paid-in Capital
Retained Earnings
Retained Earnings
Cumulative Effect, Period of Adoption, Adjustment [Member]
Retained Earnings
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Parent [Member]
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Cumulative Translation Adjustment
Cumulative Translation Adjustment
Cumulative Effect, Period of Adoption, Adjustment [Member]
Cumulative Translation Adjustment
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Defined Benefit Plans Adjustment [Member]
Cumulative Effect, Period of Adoption, Adjustment [Member]
Accumulated Defined Benefit Plans Adjustment [Member]
Cumulative Effect, Period of Adoption, Adjusted Balance [Member]
Accumulated Other Comprehensive Income
Balance – beginning of year at Dec. 31, 2017   $ 11,121 $ (1,944) $ 13,978 $ 27,474 $ 264 $ 27,738 $ 1,450 $ (296) $ 1,154 $ (1,187) $ (22) $ (1,209) $ 280 $ 47 $ 327  
Treasury Stock, Retired, Cost Method, Amount   0 0   0                        
Common Shares repurchased $ (1,021)   (1,021)                            
Net shares redeemed under employee share-based compensation plans     347 (313)                          
Stock Issued During Period, Value, Stock Options Exercised       (49)                          
Share-based compensation expense       285                          
FundingDividendsDeclaredToRetainedEarnings       (1,344)                          
Net income 3,962       3,962                        
Funding Dividends Declared From Additional Paid In Capital         1,344                        
Dividends declared on Common Shares         (1,344)                        
Change in year, before reclassification from AOCI, net of income tax (expense) benefit of $(426), $(647), and $338               (1,960)                  
Amounts reclassified from AOCI, net of income tax (expense) of $(36), nil, and $(41)               261                  
Change in year, net of income tax (expense) benefit of $(462), $(647), and $297               (1,699)                  
Change in year, net of income tax (expense) benefit of $(4), $24, and $35                     (767)            
Change in year, net of income tax benefit of $50, $18, and $67                           (254)      
Balance – Ending of year at Dec. 31, 2018 50,312 11,121 (2,618) 12,557 31,700 (12) 31,688 (545) 0 (545) (1,976)   (1,976) 73 0 73 $ (2,448)
Treasury Stock, Retired, Cost Method, Amount   0 0   0                        
Common Shares repurchased (1,531)   (1,531)                            
Net shares redeemed under employee share-based compensation plans     395 (178)                          
Stock Issued During Period, Value, Stock Options Exercised       (82)                          
Share-based compensation expense       266                          
FundingDividendsDeclaredToRetainedEarnings       (1,360)                          
Net income 4,454       4,454                        
Funding Dividends Declared From Additional Paid In Capital         1,360                        
Dividends declared on Common Shares         (1,360)                        
Change in year, before reclassification from AOCI, net of income tax (expense) benefit of $(426), $(647), and $338               3,057                  
Amounts reclassified from AOCI, net of income tax (expense) of $(36), nil, and $(41)               31                  
Change in year, net of income tax (expense) benefit of $(462), $(647), and $297               3,088                  
Change in year, net of income tax (expense) benefit of $(4), $24, and $35                     37            
Change in year, net of income tax benefit of $50, $18, and $67                           (58)      
Balance – Ending of year at Dec. 31, 2019 55,331 11,121 (3,754) 11,203 36,142 $ (72) $ 36,070 2,543 $ 0 $ 2,543 (1,939)   $ (1,939) 15 $ 0 $ 15 619
Treasury Stock, Retired, Cost Method, Amount   (57) 323   (266)                        
Common Shares repurchased (516)   (516)                            
Net shares redeemed under employee share-based compensation plans     303 (195)                          
Stock Issued During Period, Value, Stock Options Exercised       (50)                          
Share-based compensation expense       255                          
FundingDividendsDeclaredToRetainedEarnings       (1,398)                          
Net income 3,533       3,533                        
Funding Dividends Declared From Additional Paid In Capital         1,398                        
Dividends declared on Common Shares         (1,398)                        
Change in year, before reclassification from AOCI, net of income tax (expense) benefit of $(426), $(647), and $338               1,885                  
Amounts reclassified from AOCI, net of income tax (expense) of $(36), nil, and $(41)               245                  
Change in year, net of income tax (expense) benefit of $(462), $(647), and $297               2,130                  
Change in year, net of income tax (expense) benefit of $(4), $24, and $35                     302            
Change in year, net of income tax benefit of $50, $18, and $67                           (182)      
Balance – Ending of year at Dec. 31, 2020 $ 59,441 $ 11,064 $ (3,644) $ 9,815 $ 39,337     $ 4,673     $ (1,637)     $ (167)     $ 2,869
v3.20.4
Statement of Shareholders' Equity (Parenthetical) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Statement of Stockholders' Equity [Abstract]      
Other Comprehensive Income (Loss), Available-for-sale Securities, before Reclassification Adjustments, Tax $ (426) $ (647) $ 338
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax (36) 0 (41)
Net unrealized appreciation on investments, Change in year, income tax (expense) benefit (462) (647) 297
Cumulative translation adjustment, Change in year, income tax(expense) benefit (4) 24 35
Pension liability adjustment, Change in year, income tax (expense) benefit $ 50 $ 18 $ 67
v3.20.4
Consolidated Statements Of Cash Flows - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Cash flows from operating activities      
Net income $ 3,533 $ 4,454 $ 3,962
Adjustments to reconcile net income to net cash flows from operating activities      
Net Realized Gains Losses 498 530 652
Amortization of premiums/discounts on fixed maturities 367 395 592
Amortization of purchased intangibles 290 305 339
Deferred income taxes (333) (97) 16
Unpaid losses and loss expenses 4,664 (257) 570
Unearned premiums 846 1,051 654
Future policy benefits 236 215 235
Insurance and reinsurance balances payable 535 (302) 722
Accounts payable, accrued expenses, and other liabilities (98) (207) 375
Income taxes payable 46 (7) 161
Insurance and reinsurance balances receivable (114) (270) (981)
Reinsurance recoverable (336) 838 (1,165)
Deferred policy acquisition costs (89) (344) (301)
Other (260) 38 (351)
Net cash flows from operating activities 9,785 6,342 5,480
Cash flows from investing activities      
Purchases of fixed maturities available for sale (26,298) (25,846) (24,700)
Purchases of to be announced mortgage-backed securities 0 0 (35)
Purchases of fixed maturities held to maturity (202) (229) (456)
Purchases of equity securities (6,419) (531) (207)
Sales of fixed maturities available for sale 11,377 13,110 14,001
Sales of to be announced mortgage-backed securities 0 6 29
Sales of equity securities 3,880 611 315
Maturities and redemptions of fixed maturities available for sale 12,450 9,039 7,352
Maturities and redemptions of fixed maturities held to maturity 995 946 1,124
Net change in short-term investments (81) (1,117) 516
Net derivative instruments settlements (113) (703) 16
Private equity contributions (1,924) (1,315) (1,337)
Private equity distributions 907 1,390 980
Acquisition of subsidiaries (net of cash acquired of nil, $45, and nil) 0 (29) 0
Payment, including deposit, for Huatai Group Interest (1,623) (580)  
Other (470) (657) (533)
Net Cash Provided by (Used in) Investing Activities (7,521) (5,905) (2,935)
Cash flows from financing activities      
Dividends paid on Common Shares (1,388) (1,354) (1,337)
Common Shares repurchased (523) (1,530) (1,044)
Proceeds from issuance of long-term debt 988 2,828 2,171
Proceeds from issuance of repurchase agreements 2,354 2,817 2,029
Repayments of Long-term Debt (1,301) (510) (2,001)
Repayment of repurchase agreements (2,354) (2,817) (2,019)
Proceeds from share-based compensation plans 145 204 115
Policyholder contract deposits 470 514 453
Policyholder contract withdrawals (386) (303) (358)
Other (87) 0 0
Net cash flows (used for) from financing activities (2,082) (151) (1,991)
Effect of foreign currency rate changes on cash and restricted cash 8 20 (65)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect 190 306 489
Cash and restricted cash - beginning of year 1,646 [1],[2] 1,340 [2],[3] 851 [3]
Cash and restricted cash - end of year [2] 1,836 1,646 [1] 1,340 [3]
Supplemental cash flow information      
Taxes paid 902 912 503
Interest paid 524 512 621
Cash Acquired from Acquisition 0 45 0
CHINA | Huatai Group [Member]      
Cash flows from investing activities      
Payment, including deposit, for Huatai Group Interest $ (1,623) $ (580) $ 0
[1] Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2018, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.
[2] Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2020, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.
[3] Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2018 and 2017, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.
v3.20.4
Summary of significant accounting policies
12 Months Ended
Dec. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Summary of significant accounting policies Summary of significant accounting policies
a) Basis of presentation

Chubb Limited is a holding company incorporated in Zurich, Switzerland. Chubb Limited, through its subsidiaries, provides a broad range of insurance and reinsurance products to insureds worldwide. Our results are reported through the following business segments: North America Commercial P&C Insurance, North America Personal P&C Insurance, North America Agricultural Insurance, Overseas General Insurance, Global Reinsurance, and Life Insurance. Refer to Note 15 for additional information.

The accompanying Consolidated Financial Statements, which include the accounts of Chubb Limited and its subsidiaries (collectively, Chubb, we, us, or our), have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP) and, in the opinion of management, reflect all adjustments necessary for a fair statement of the results and financial position for such periods. All significant intercompany accounts and transactions, including internal reinsurance transactions, have been eliminated.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Amounts included in the Consolidated Financial Statements reflect our best estimates and assumptions; actual amounts could differ materially from these estimates. Chubb's principal estimates include:
unpaid loss and loss expense reserves, including long-tail asbestos and environmental (A&E) reserves and non-A&E casualty exposures;
future policy benefits reserves;
amortization of deferred policy acquisition costs and value of business acquired (VOBA);
reinsurance recoverable, including a valuation allowance for uncollectible reinsurance;
the assessment of risk transfer for certain structured insurance and reinsurance contracts;
the valuation of the investment portfolio and assessment of valuation allowance for expected credit losses;
the valuation of deferred income taxes;
the valuation of derivative instruments related to guaranteed living benefits (GLB);
the valuation and amortization of purchased intangibles; and
the assessment of goodwill for impairment.

b) Premiums
Premiums are generally recorded as written upon inception of the policy. For multi-year policies for which premiums written are payable in annual installments, only the current annual premium is included as written at policy inception due to the ability of the insured/reinsured to commute or cancel coverage within the policy term. The remaining annual premiums are recorded as written at each successive anniversary date within the multi-year term.

For property and casualty (P&C) insurance and reinsurance products, premiums written are primarily earned on a pro-rata basis over the policy terms to which they relate. Unearned premiums represent the portion of premiums written applicable to the unexpired portion of the policies in force. For retrospectively-rated policies, written premiums are adjusted to reflect expected ultimate premiums consistent with changes to incurred losses, or other measures of exposure as stated in the policy, and earned over the policy coverage period.

Mandatory reinstatement premiums assessed on reinsurance policies are earned in the period of the loss event that gave rise to the reinstatement premiums. All remaining unearned premiums are recognized over the remaining coverage period. 

Premiums from long-duration contracts such as certain traditional term life, whole life, endowment, and long-duration personal accident and health (A&H) policies are generally recognized as revenue when due from policyholders. Traditional life policies
include those contracts with fixed and guaranteed premiums and benefits. Benefits and expenses are matched with income to result in the recognition of profit over the life of the contracts.

Retroactive loss portfolio transfer (LPT) contracts in which the insured loss events occurred prior to contract inception are evaluated to determine whether they meet criteria for reinsurance accounting. If reinsurance accounting is appropriate, written premiums are fully earned and corresponding losses and loss expenses recognized at contract inception. These contracts can cause significant variances in gross premiums written, net premiums written, net premiums earned, and net incurred losses in the years in which they are written. Reinsurance contracts sold not meeting the criteria for reinsurance accounting are recorded using the deposit method as described below in Note 1 k).

Reinsurance premiums assumed are based on information provided by ceding companies supplemented by our own estimates of premium when we have not received ceding company reports. Estimates are reviewed and adjustments are recorded in the period in which they are determined. Premiums are earned over the coverage terms of the related reinsurance contracts and range from one to three years.

c) Deferred policy acquisition costs and value of business acquired
Policy acquisition costs consist of commissions (direct and ceded), premium taxes, and certain underwriting costs related directly to the successful acquisition of new or renewal insurance contracts. A VOBA intangible asset is established upon the acquisition of blocks of long-duration contracts in a business combination and represents the present value of estimated net cash flows for the contracts in force at the acquisition date. Acquisition costs and VOBA, collectively policy acquisition costs, are deferred and amortized. Amortization is recorded in Policy acquisition costs in the Consolidated statements of operations. Policy acquisition costs on P&C contracts are generally amortized ratably over the period in which premiums are earned. Policy acquisition costs on traditional long-duration contracts are amortized over the estimated life of the contracts, generally in proportion to premium revenue recognized based upon the same assumptions used in estimating the liability for future policy benefits. For non-traditional long-duration contracts, we amortize policy acquisition costs over the expected life of the contracts in proportion to expected gross profits. The effect of changes in estimates of expected gross profits is reflected in the period the estimates are revised. Policy acquisition costs are reviewed to determine if they are recoverable from future income, including investment income. Unrecoverable policy acquisition costs are expensed in the period identified.
Advertising costs are expensed as incurred except for direct-response campaigns that qualify for cost deferral, principally related to long-duration A&H business produced by the Overseas General Insurance segment, which are deferred and recognized as a component of Policy acquisition costs. For individual direct-response marketing campaigns that we can demonstrate have specifically resulted in incremental sales to customers and such sales have probable future economic benefits, incremental costs directly related to the marketing campaigns are capitalized as Deferred policy acquisition costs. Deferred policy acquisition costs, including deferred marketing costs, are reviewed regularly for recoverability from future income, including investment income, and amortized in proportion to premium revenue recognized, primarily over a ten-year period, the expected economic future benefit period based upon the same assumptions used in estimating the liability for future policy benefits. The expected future benefit period is evaluated periodically based on historical results and adjusted prospectively. The amount of deferred marketing costs reported in Deferred policy acquisition costs in the Consolidated balance sheets was $226 million and $246 million at December 31, 2020 and 2019, respectively. Amortization expense for deferred marketing costs was $99 million, $109 million, and $114 million for the years ended December 31, 2020, 2019, and 2018, respectively.

d) Reinsurance
Chubb assumes and cedes reinsurance with other insurance companies to provide greater diversification of business and minimize the net loss potential arising from large risks. Ceded reinsurance contracts do not relieve Chubb of its primary obligation to policyholders.

For both ceded and assumed reinsurance, risk transfer requirements must be met in order to account for a contract as reinsurance, principally resulting in the recognition of cash flows under the contract as premiums and losses. To meet risk transfer requirements, a reinsurance contract must include insurance risk, consisting of both underwriting and timing risk, and a reasonable possibility of a significant loss for the assuming entity. To assess risk transfer for certain contracts, Chubb generally develops expected discounted cash flow analyses at contract inception. Deposit accounting is used for contracts that do not meet risk transfer requirements. Deposit accounting requires that consideration received or paid be recorded in the balance sheet as opposed to recording premiums written or losses incurred in the statement of operations. Non-refundable fees on deposit contracts are earned based on the terms of the contract described below in Note 1 k).
Reinsurance recoverable includes balances due from reinsurance companies for paid and unpaid losses and loss expenses and future policy benefits that will be recovered from reinsurers, based on contracts in force. The method for determining the reinsurance recoverable on unpaid losses and loss expenses incurred but not reported (IBNR) involves actuarial estimates consistent with those used to establish the associated liability for unpaid losses and loss expenses as well as a determination of Chubb's ability to cede unpaid losses and loss expenses under the terms of the reinsurance agreement.

Reinsurance recoverable is presented net of a valuation allowance for uncollectible reinsurance determined based upon a review of the financial condition of reinsurers and other factors. The valuation allowance for uncollectible reinsurance is based on an estimate of the reinsurance recoverable balance that will ultimately be unrecoverable due to reinsurer insolvency, a contractual dispute, or any other reason. The valuation of this allowance includes several judgments including certain aspects of the allocation of reinsurance recoverable on IBNR claims by reinsurer and a default analysis to estimate uncollectible reinsurance. The primary components of the default analysis are reinsurance recoverable balances by reinsurer, net of collateral, and default factors used to determine the portion of a reinsurer's balance deemed uncollectible. The definition of collateral for this purpose requires some judgment and is generally limited to assets held in a Chubb-only beneficiary trust, letters of credit, and liabilities held with the same legal entity for which Chubb believes there is a contractual right of offset. The determination of the default factor is principally based on the financial strength rating of the reinsurer. Default factors require considerable judgment and are determined using the current financial strength rating, or rating equivalent, of each reinsurer as well as other key considerations and assumptions. Changes in the valuation allowance for uncollectible reinsurance recoverables are recorded in Losses and loss expenses in the Consolidated statements of operations. Our methodology to calculate the valuation allowance was consistent with the new expected credit loss guidance adopted on January 1, 2020. Therefore, there was no change to the valuation allowance upon adoption. The more significant considerations include, but are not necessarily limited to, the following:
For reinsurers that maintain a financial strength rating from a major rating agency, and for which recoverable balances are considered representative of the larger population (i.e., default probabilities are consistent with similarly rated reinsurers and payment durations conform to averages), the financial rating is based on a published source and the default factor is based on published default statistics of a major rating agency applicable to the reinsurer's particular rating class. When a recoverable is expected to be paid in a brief period of time by a highly rated reinsurer, such as certain property catastrophe claims, a default factor may not be applied;
For balances recoverable from reinsurers that are both unrated by a major rating agency and for which management is unable to determine a credible rating equivalent based on a parent, affiliate, or peer company, we determine a rating equivalent based on an analysis of the reinsurer that considers an assessment of the creditworthiness of the particular entity, industry benchmarks, or other factors as considered appropriate. We then apply the applicable default factor for that rating class. For balances recoverable from unrated reinsurers for which the ceded reserve is below a certain threshold, we generally apply a default factor of 34 percent, consistent with published statistics of a major rating agency;
For balances recoverable from reinsurers that are either insolvent or under regulatory supervision, we establish a default factor and resulting valuation allowance for uncollectible reinsurance based on reinsurer-specific facts and circumstances. Upon initial notification of an insolvency, we generally recognize an expense for a substantial portion of all balances outstanding, net of collateral, through a combination of write-offs of recoverable balances and increases to the valuation allowance for uncollectible reinsurance. When regulatory action is taken on a reinsurer, we generally recognize a default factor by estimating an expected recovery on all balances outstanding, net of collateral. When sufficient credible information becomes available, we adjust the valuation allowance for uncollectible reinsurance by establishing a default factor pursuant to information received; and
For other recoverables, management determines the valuation allowance for uncollectible reinsurance based on the specific facts and circumstances.

The methods used to determine the reinsurance recoverable balance and related valuation allowance for uncollectible reinsurance are regularly reviewed and updated, and any resulting adjustments are reflected in earnings in the period identified.

The methods used to determine the valuation allowance for uncollectible high deductible recoverable amounts and valuation allowance for insurance and reinsurance balances receivable are similar to the processes used to determine the valuation allowance for uncollectible reinsurance recoverable. For information on high deductible policies, refer to section h) Unpaid losses and loss expenses, below.

Prepaid reinsurance premiums represent the portion of premiums ceded to reinsurers applicable to the unexpired coverage terms of the reinsurance contracts in-force.
The value of reinsurance business assumed is the deferred gain or loss related to loss portfolio transfers assumed and is calculated as the difference between the estimated ultimate value of the liabilities assumed under retroactive reinsurance contracts over consideration received. The gain or loss is amortized and recorded to Losses and loss expenses based on the payment pattern of the losses assumed. The unamortized value is reviewed regularly to determine if it is recoverable based upon the terms of the contract, estimated losses and loss expenses, and anticipated investment income. Unrecoverable amounts are expensed in the period identified. The value of reinsurance business assumed at December 31, 2020 and 2019 were immaterial.

e) Investments
Fixed maturities, equity securities, and short-term investments
Fixed maturities are classified as either available for sale or held to maturity.
Available for sale (AFS) portfolio is reported at fair value, net of a valuation allowance for credit losses, with changes in fair value recorded as a separate component of AOCI in Shareholders' equity.
Held to maturity (HTM) portfolio includes securities for which we have the ability and intent to hold to maturity or redemption and is reported at amortized cost, net of a valuation allowance for credit losses.

Equity securities are reported at fair value with changes in fair value recorded in net realized gains (losses) on the Consolidated statement of operations.

Short-term investments comprise securities due to mature within one year of the date of purchase and are recorded at fair value which typically approximates cost.

Interest, dividend income, and amortization of fixed maturity market premiums and discounts, related to these securities are recorded in Net investment income, net of investment management and custody fees, in the Consolidated statement of operations.

In addition, net investment income includes the amortization of the fair value adjustment related to the acquired invested assets of The Chubb Corporation (Chubb Corp). An adjustment of $1,652 million related to the fair value of Chubb Corp’s fixed maturities securities was recorded (fair value adjustment) at the date of acquisition. At December 31, 2020, the remaining balance of this fair value adjustment was $213 million which is expected to amortize over the next two years; however, the estimate could vary materially based on current market conditions, bond calls, and the duration of the acquired investment portfolio. In addition, sales of these acquired fixed maturities would also reduce the fair value adjustment balance. For mortgage-backed securities and any other holdings for which there is a prepayment risk, prepayment assumptions are evaluated and revised as necessary. Any adjustments required due to the resultant change in effective yields and maturities are recognized prospectively. Prepayment fees or call premiums that are only payable when a security is called prior to its maturity are earned when received and reflected in Net investment income. 

Valuation allowance for fixed income securities
Management evaluates current expected credit losses (CECL) for all HTM securities each quarter. U.S. treasury and agency securities and U.S. government agency mortgage-backed securities are assumed to have no risk of non-payment and therefore are excluded from the CECL evaluation. The remaining HTM securities are evaluated for potential credit loss on a collective pool basis. We elected to pool HTM securities by 1) external credit rating and 2) time to maturity (duration). These characteristics are the most representative of similar risk characteristics within our portfolio. Chubb pools HTM securities and calculates an expected credit loss for each pool using Moody’s corporate bond default average, corporate bond recovery rate, and an economic cycle multiplier. The multiplier is based on the leading economic index and will adjust the average default frequency for a forward-looking economic outlook. Management monitors the credit quality of HTM securities through the review of external credit ratings on a quarterly basis.

Management evaluates expected credit losses (ECL) for AFS securities when fair value is below amortized cost. AFS securities are evaluated for potential credit loss on an individual security level but the evaluation may use assumptions consistent with expectations of credit losses for a group of similar securities. If management has the intent to sell or will be required to sell the security before recovery, the entire impairment loss will be recorded through income to net realized gains and losses. If management does not have the intent to sell or will not be required to sell the security before recovery, an allowance for credit losses is established and is recorded through income to net realized gains and losses, and the non-credit loss portion is recorded through other comprehensive income.
Examples of criteria that are collectively evaluated to determine if a credit loss has occurred include the following:
The extent to which the fair value is less than amortized cost;
Adverse conditions related to the security, industry, or geographic area;
Downgrades in the security's credit rating by a rating agency; and
Failure of the issuer to make scheduled principal or interest payments

AFS securities that meet any one of the criteria included above will be subject to a discounted cash flow analysis by comparing the present value of expected future cash flows with the amortized cost basis. Projected cash flows are driven primarily by assumptions regarding probability of default and the timing and amount of recoveries associated with defaults. Chubb developed the projected cash flows using market data, issuer-specific information, and credit ratings. In combination with contractual cash flows and the use of historical default and recovery data by Moody's Investors Service (Moody's) rating category we generate expected cash flows using the average cumulative issuer-weighted global default rates by letter rating.

If the present value of expected future cash flows is less than the amortized cost, a credit loss exists and an allowance for credit losses will be recognized. If the present value of expected future cash flows is equal to or greater than the amortized cost basis, management will conclude an expected credit loss does not exist.

Management reviews credit losses and the valuation allowance for expected credit losses each quarter. When all or a portion of a fixed maturity security is identified to be uncollectible and written off, the valuation allowance for expected credit losses is reduced by the same amount. In general, a security is considered uncollectible no later than when all efforts to collect contractual cash flows have been exhausted. Below are considerations for when a security may be deemed uncollectible:
We have sufficient information to determine that the issuer of the security is insolvent;
We receive notice that the issuer of the security has filed for bankruptcy, and the collectability is expected to be adversely impacted by the bankruptcy;
The issuer of a security has violated multiple debt covenants;
Amounts have been past due for a specified period of time with no response from the issuer;
A significant deterioration in the value of the collateral has occurred;
We have received correspondence from the issuer of the security indicating that it doesn’t intend to pay the contractual principal and interest.
We elected to not measure an allowance for accrued investment income as uncollectible balances are written off in a timely manner, typically 30 to 45 days after uncollected balances are due.
Prior to January 1, 2020, fixed income securities were evaluated individually for other-than-temporary impairment (OTTI) and a realized loss was recognized once certain criteria were met.

Other investments
Other investments principally comprise investment funds, limited partnerships, partially-owned investment companies, life insurance policies, policy loans, and non-qualified separate account assets.

Investment funds and limited partnerships
Investment funds, limited partnerships, and all other investments over which Chubb cannot exercise significant influence are accounted for as follows. Generally, we own less than three percent of the investee’s shares.
Income and expenses from these funds are reported within Net investment income.
These funds are carried at net asset value, which approximates fair value with changes in fair value recorded in net realized gains (losses) on the Consolidated statement of operations. Refer to Note 4 for a further discussion on net asset value.
As a result of the timing of the receipt of valuation data from the investment managers, these investments are generally reported on a three-month lag.
Sales of these investments are reported within Net realized gains (losses).
Partially-owned investment companies
Partially-owned investment companies where our ownership interest is in excess of three percent are accounted for under the equity method because Chubb exerts significant influence. These investments apply investment company accounting to determine operating results, and Chubb retains the investment company accounting in applying the equity method.
This means that investment income, realized gains or losses, and unrealized gains or losses are included in the portion of equity earnings reflected in Other (income) expense.
As a result of the timing of the receipt of valuation data from the investment managers, these investments are generally reported on a three-month lag.
Other
Policy loans are carried at outstanding balance and interest income is reflected in Net investment income.
Life insurance policies are carried at policy cash surrender value and income is reflected in Other (income) expense.
Non-qualified separate account assets are supported by assets that do not qualify for separate accounting reporting under GAAP. The underlying securities are recorded on a trade date basis and carried at fair value. Unrealized gains and losses on non-qualified separate account assets are reflected in Other (income) expense.

Investments in partially-owned insurance companies
Investments in partially-owned insurance companies primarily represent direct investments in which Chubb has significant influence and as such, meet the requirements for equity accounting. Generally, we own twenty percent or more of the investee’s shares. We report our share of the net income or loss of the partially-owned insurance companies in Other (income) expense.

Derivative instruments
Chubb recognizes all derivatives at fair value in the Consolidated balance sheets in either Accounts payable, accrued expenses, and other liabilities or Other assets. Changes in fair value are included in Net realized gains (losses) in the Consolidated statements of operations. We did not designate any derivatives as accounting hedges. We participate in derivative instruments in two principal ways:

(i) To sell protection to customers as an insurance or reinsurance contract that meets the definition of a derivative for accounting purposes. This category principally comprised our GLB contracts; and
(ii) To mitigate financial risks and manage certain investment portfolio risks and exposures, including assets and liabilities held in foreign currencies. We use derivative instruments including futures, options, swaps, and foreign currency forward contracts. Refer to Note 10 for additional information.

Securities lending program
Chubb participates in a securities lending program operated by a third-party banking institution whereby certain assets are loaned to qualified borrowers and from which we earn an incremental return which is recorded within Net investment income in the Consolidated statement of operations.

Borrowers provide collateral, in the form of either cash or approved securities, at a minimum of 102 percent of the fair value of the loaned securities. Each security loan is deemed to be an overnight transaction. Cash collateral is invested in a collateral pool which is managed by the banking institution. The collateral pool is subject to written investment guidelines with key objectives which include the safeguard of principal and adequate liquidity to meet anticipated redemptions. The fair value of the loaned securities is monitored on a daily basis, with additional collateral obtained or refunded as the fair value of the loaned securities changes. The collateral is held by the third-party banking institution, and the collateral can only be accessed in the event that the institution borrowing the securities is in default under the lending agreement. As a result of these restrictions, we consider our securities lending activities to be non-cash investing and financing activities. An indemnification agreement with the lending agent protects us in the event a borrower becomes insolvent or fails to return any of the securities on loan.

The fair value of the securities on loan is included in fixed maturities and equity securities in the Consolidated balance sheets. The securities lending collateral is reported as a separate line in the Consolidated balance sheets with a related liability reflecting our obligation to return the collateral plus interest.
Repurchase agreements
Similar to securities lending arrangements, securities sold under repurchase agreements, whereby Chubb sells securities and repurchases them at a future date for a predetermined price, are accounted for as collateralized investments and borrowings and are recorded at the contractual repurchase amounts plus accrued interest. Assets to be repurchased are the same or substantially the same as the assets transferred, and the transferor, through right of substitution, maintains the right and ability to redeem the collateral on short notice. The fair value of the underlying securities is included in fixed maturities and equity securities. In contrast to securities lending programs, the use of cash received is not restricted. We report the obligation to return the cash as Repurchase agreements in the Consolidated balance sheets and record the fees under these repurchase agreements within Interest expense on the Consolidated statement of operations.

Refer to Note 4 for a discussion on the determination of fair value for Chubb's various investment securities.

f) Cash
We have agreements with a third-party bank provider which implemented two international multi-currency notional cash pooling programs. In each program, participating Chubb entities establish deposit accounts in different currencies with the bank provider and each day the credit or debit balances in every account are notionally translated into a single currency (U.S. dollars) and then notionally pooled. The bank extends overdraft credit to any participating Chubb entity as needed, provided that the overall notionally-pooled balance of all accounts in each pool at the end of each day is at least zero. Actual cash balances are not physically converted and are not commingled between legal entities. Any overdraft balances incurred under this program by a Chubb entity would be guaranteed by Chubb Limited (up to $300 million in the aggregate). Our syndicated letter of credit facility allows for same day drawings to fund a net pool overdraft should participating Chubb entities overdraw contributed funds from the pool.

Restricted cash
Restricted cash in the Consolidated balance sheets represents amounts held for the benefit of third parties and is legally or contractually restricted as to withdrawal or usage. Amounts include deposits with U.S. and non-U.S. regulatory authorities, trust funds set up for the benefit of ceding companies, and amounts pledged as collateral to meet financing arrangements.

The following table provides a reconciliation of cash and restricted cash reported within the Consolidated balance sheets that total to the amounts shown in the Consolidated statements of cash flows:
December 31
(in millions of U.S. dollars)202020192018
Cash$1,747 $1,537 $1,247 
Restricted cash89 109 93 
Total cash and restricted cash shown in the Consolidated statements of cash flows$1,836 $1,646 $1,340 

g) Goodwill and Other intangible assets
Goodwill represents the excess of the cost of acquisitions over the fair value of net assets acquired and is not amortized. Goodwill is assigned at acquisition to the applicable reporting unit of the acquired entities giving rise to the goodwill. Goodwill impairment tests are performed annually or more frequently if circumstances indicate a possible impairment. For goodwill impairment testing, we use a qualitative assessment to determine whether it is more likely than not (i.e., more than a 50 percent probability) that the fair value of a reporting unit is greater than its carrying amount. If our assessment indicates less than a 50 percent probability that fair value exceeds carrying value, we quantitatively estimate a reporting unit's fair value. Goodwill recorded in connection with investments in partially-owned insurance companies is recorded in Investments in partially-owned insurance companies and is also measured for impairment annually.

Indefinite lived intangible assets are not subject to amortization. Finite lived intangible assets are amortized over their useful lives, generally with an average original useful life of 25 years. Intangible assets are regularly reviewed for indicators of impairment. Impairment is recognized if the carrying amount is not recoverable from its undiscounted cash flows and is measured as the difference between the carrying amount and fair value.

h) Unpaid losses and loss expenses
A liability is established for the estimated unpaid losses and loss expenses under the terms of, and with respect to, Chubb's policies and agreements. Similar to premiums that are recognized as revenues over the coverage period of the policy, a liability for unpaid losses and loss expenses is recognized as expense when insured events occur over the coverage period of the policy.
This liability includes a provision for both reported claims (case reserves) and incurred but not reported claims (IBNR reserves). IBNR reserve estimates are generally calculated by first projecting the ultimate cost of all losses that have occurred (expected losses), and then subtracting paid losses, case reserves, and loss expenses. The methods of determining such estimates and establishing the resulting liability are reviewed regularly and any adjustments are reflected in income in the period in which they become known. Future developments may result in losses and loss expenses materially greater or less than recorded amounts.

Except for net unpaid loss and loss expense reserves of $26 million, net of discount, held at December 31, 2020, representing certain structured settlements for which the timing and amount of future claim payments are reliably determinable and $42 million, net of discount, of certain reserves for unsettled claims, Chubb does not discount its P&C loss reserves. This compares with reserves of $31 million for certain structured settlements and $43 million of certain reserves for unsettled claims at December 31, 2019. Structured settlements represent contracts purchased from life insurance companies primarily to settle workers' compensation claims, where payments to the claimant by the life insurance company are expected to be made in the form of an annuity. Chubb retains the liability to the claimant in the event that the life insurance company fails to pay. At December 31, 2020, the liability due to claimants was $548 million, net of discount, and reinsurance recoverables due from the life insurance companies was $522 million, net of discount. For structured settlement contracts where payments are guaranteed regardless of claimant life expectancy, the amounts recoverable from the life insurance companies at December 31, 2020 are included in Other assets in the Consolidated balance sheets, as they do not meet the requirements for reinsurance accounting.

Included in Unpaid losses and loss expenses are liabilities for asbestos and environmental (A&E) claims and expenses. These unpaid losses and loss expenses are principally related to claims arising from remediation costs associated with hazardous waste sites and bodily-injury claims related to asbestos products and environmental hazards. The estimation of these liabilities is particularly sensitive to changes in the legal environment including specific settlements that may be used as precedents to settle future claims. However, Chubb does not anticipate future changes in laws and regulations in setting its A&E reserve levels.

Also included in Unpaid losses and loss expenses is the fair value adjustment of $110 million and $145 million at December 31, 2020 and 2019, respectively, related to Chubb Corp’s historical unpaid losses and loss expenses. The estimated fair value consists of the present value of the expected net unpaid loss and loss adjustment expense payments adjusted for an estimated risk margin. The estimated cash flows are discounted at a risk free rate. The estimated risk margin varies based on the inherent risks associated with each type of reserve. The fair value is amortized through Amortization of purchased intangibles on the consolidated statements of operations through the year 2032, based on the estimated payout patterns of unpaid loss and loss expenses at the acquisition date.

Our loss reserves are presented net of contractual deductible recoverable amounts due from policyholders. Under the terms of certain high deductible policies which we offer, such as workers’ compensation and general liability, our customers are responsible to reimburse us for an agreed-upon dollar amount per claim. In nearly all cases we are required under such policies to pay covered claims first, and then seek reimbursement for amounts within the applicable deductible from our customers. We generally seek to mitigate this risk through collateral agreements.

Prior period development arises from changes to loss estimates recognized in the current year that relate to loss reserves first reported in previous calendar years and excludes the effect of losses from the development of earned premiums from previous accident years.

For purposes of analysis and disclosure, management views prior period development to be changes in the nominal value of loss estimates from period to period, net of premium and profit commission adjustments on loss sensitive contracts. Prior period development generally excludes changes in loss estimates that do not arise from the emergence of claims, such as those related to uncollectible reinsurance, interest, unallocated loss adjustment expenses, or foreign currency. Accordingly, specific items excluded from prior period development include the following: gains/losses related to foreign currency remeasurement; losses recognized from the early termination or commutation of reinsurance agreements that principally relate to the time value of money; changes in the value of reinsurance business assumed reflected in losses incurred but principally related to the time value of money; and losses that arise from changes in estimates of earned premiums from prior accident years. Except for foreign currency remeasurement, which is included in Net realized gains (losses), these items are included in current year losses.

i) Future policy benefits
The valuation of long-duration contract reserves requires management to make estimates and assumptions regarding expenses, mortality, persistency, and investment yields. Estimates are primarily based on historical experience and include a margin for
adverse deviation. Interest rates used in calculating reserves range from less than 1.0 percent to 9.0 percent at December 31, 2020 compared to less than 1.0 percent to 11.0 percent at December 31, 2019. Actual results could differ materially from these estimates. Management monitors actual experience and where circumstances warrant, will revise assumptions and the related reserve estimates. Revisions are recorded in the period they are determined.

Certain of our long-duration contracts are supported by assets that do not qualify for separate account reporting under GAAP. These assets are classified as non-qualified separate account assets and reported in Other investments and the offsetting liabilities are reported in Future policy benefits in the Consolidated balance sheets. Changes in the fair value of separate account assets that do not qualify for separate account reporting under GAAP are reported in Other income (expense) and the offsetting movements in the liabilities are included in Policy benefits in the Consolidated statements of operations.

j) Assumed reinsurance programs involving minimum benefit guarantees under variable annuity contracts
Chubb reinsures various death and living benefit guarantees associated with variable annuities issued primarily in the United States. We generally receive a monthly premium during the accumulation phase of the covered annuities (in-force) based on a percentage of either the underlying accumulated account values or the underlying accumulated guaranteed values. Depending on an annuitant's age, the accumulation phase can last many years. To limit our exposure under these programs, all reinsurance treaties include annual or aggregate claim limits and many include an aggregate deductible.

The guarantees which are payable on death, referred to as guaranteed minimum death benefits (GMDB), principally cover shortfalls between accumulated account value at the time of an annuitant's death and either i) an annuitant's total deposits; ii) an annuitant's total deposits plus a minimum annual return; or iii) the highest accumulated account value attained at any policy anniversary date. In addition, a death benefit may be based on a formula specified in the variable annuity contract that uses a percentage of the growth of the underlying contract value. Liabilities for GMDBs are based on cumulative assessments or premiums to date multiplied by a benefit ratio that is determined by estimating the present value of benefit payments and related adjustment expenses divided by the present value of cumulative assessment or expected premiums during the contract period.  

Under reinsurance programs covering GLBs, we assume the risk of guaranteed minimum income benefits (GMIB) associated with variable annuity contracts. The GMIB risk is triggered if, at the time the contract holder elects to convert the accumulated account value to a periodic payment stream (annuitize), the accumulated account value is not sufficient to provide a guaranteed minimum level of monthly income. Our GLB reinsurance products meet the definition of a derivative for accounting purposes and are carried at fair value with changes in fair value recognized in Realized gains (losses) in the Consolidated statement of operations. Refer to Note 10 a) for additional information.

k) Deposit assets and liabilities
Deposit assets arise from ceded reinsurance contracts purchased that do not transfer significant underwriting or timing risk. Deposit liabilities include reinsurance deposit liabilities and contract holder deposit funds. The reinsurance deposit liabilities arise from contracts sold for which there is not a significant transfer of risk. Contract holder deposit funds represent a liability for investment contracts sold that do not meet the definition of an insurance contract, and certain of these contracts are sold with a guaranteed rate of return. Under deposit accounting, consideration received or paid is recorded as a deposit asset or liability in the balance sheet as opposed to recording premiums and losses in the statement of operations.

Interest income on deposit assets, representing the consideration received or to be received in excess of cash payments related to the deposit contract, is earned based on an effective yield calculation. The calculation of the effective yield is based on the amount and timing of actual cash flows at the balance sheet date and the estimated amount and timing of future cash flows. The effective yield is recalculated periodically to reflect revised estimates of cash flows. When a change in the actual or estimated cash flows occurs, the resulting change to the carrying amount of the deposit asset is reported as income or expense. Deposit assets of $107 million and $93 million at December 31, 2020 and 2019, respectively, are reflected in Other assets in the Consolidated balance sheets and the accretion of deposit assets related to interest pursuant to the effective yield calculation is reflected in Net investment income in the Consolidated statements of operations.

Deposit liabilities include reinsurance deposit liabilities of $86 million and $88 million and contract holder deposit funds of $2.2 billion and $2.0 billion at December 31, 2020 and 2019, respectively. Deposit liabilities are reflected in Accounts payable, accrued expenses, and other liabilities in the Consolidated balance sheets. At contract inception, the deposit liability equals net cash received. An accretion rate is established based on actuarial estimates whereby the deposit liability is increased to the estimated amount payable over the contract term. The deposit accretion rate is the rate of return required to fund expected future payment obligations. We periodically reassess the estimated ultimate liability and related expected rate of
return. Changes to the deposit liability are generally reflected through Interest expense to reflect the cumulative effect of the period the contract has been in force, and by an adjustment to the future accretion rate of the liability over the remaining estimated contract term.

The liability for contract holder deposit funds equals accumulated policy account values, which consist of the deposit payments plus credited interest less withdrawals and amounts assessed through the end of the period.

l) Property and Equipment
Property and equipment used in operations are capitalized and carried at cost less accumulated depreciation and are reported within Other assets in the Consolidated balance sheets. At December 31, 2020, property and equipment totaled $2.0 billion, consisting principally of capitalized software costs of $1.3 billion incurred to develop or obtain computer software for internal use and company-owned facilities of $260 million. Depreciation is calculated using the straight-line method over the estimated useful lives of the assets. For capitalized software, the estimated useful life is generally three to five years, but can be as long as 15 years and for company-owned facilities the estimated useful life is 40 years. At December 31, 2019, property and equipment totaled $1.9 billion. 

m) Foreign currency remeasurement and translation
The functional currency for each of our foreign operations is generally the currency of the local operating environment. Transactions in currencies other than a foreign operation's functional currency are remeasured into the functional currency, and the resulting foreign exchange gains and losses are reflected in Net realized gains (losses) in the Consolidated statements of operations. Functional currency assets and liabilities are translated into the reporting currency, U.S. dollars, using period end exchange rates and the related translation adjustments are recorded as a separate component of AOCI in Shareholders' equity. Functional statement of operations amounts expressed in functional currencies are translated using average exchange rates.

n) Administrative expenses
Administrative expenses generally include all operating costs other than policy acquisition costs. The North America Commercial P&C Insurance segment manages and uses an in-house third-party claims administrator, ESIS Inc. (ESIS). ESIS performs claims management and risk control services for domestic and international organizations that self-insure P&C exposures as well as internal P&C exposures. The net operating income of ESIS is included within Administrative expenses in the Consolidated statements of operations and were $18 million, $47 million, and $49 million for the years ended December 31, 2020, 2019, and 2018, respectively.

o) Income taxes
Income taxes have been recorded related to those operations subject to income tax. Deferred tax assets and liabilities result from temporary differences between the amounts recorded in the Consolidated Financial Statements and the tax basis of our assets and liabilities. The effect on deferred tax assets and liabilities of a change in tax law or rates is recognized in the period that includes the enactment date. A valuation allowance against deferred tax assets is recorded if it is more likely than not that all, or some portion, of the benefits related to these deferred tax assets will not be realized. The valuation allowance assessment considers tax planning strategies, where appropriate.

We recognize uncertain tax positions that are determined to be more likely than not of being sustained upon examination. Recognized income tax positions are measured at the largest amount that has a greater than 50 percent likelihood of being realized. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs.

p) Earnings per share
Basic earnings per share is calculated using the weighted-average shares outstanding, including participating securities with non-forfeitable rights to dividends such as unvested restricted stock. All potentially dilutive securities, including stock options are excluded from the basic earnings per share calculation. In calculating diluted earnings per share, the weighted-average shares outstanding is increased to include all potentially dilutive securities. Basic and diluted earnings per share are calculated by dividing net income by the applicable weighted-average number of shares outstanding during the year.

q) Share-based compensation
Chubb measures and records compensation cost for all share-based payment awards at grant-date fair value. Compensation costs are recognized for vesting of share-based payment awards with only service conditions on a straight-line basis over the requisite service period for each separately vesting portion of the award as if the award were, in substance, multiple awards. For retirement-eligible participants, compensation costs for certain share-based payment awards are recognized immediately at the date of grant. Refer to Note 12 for additional information.
r) Chubb integration expenses
Direct costs related to the Chubb Corp acquisition were expensed as incurred. Chubb integration expenses were nil, $23 million, and $59 million for the years ended December 31, 2020, 2019 and 2018, respectively, and include all internal and external costs directly related to the integration activities of the Chubb Corp acquisition. These expenses principally consisted of personnel-related expenses, consulting fees, and rebranding.

s) New accounting pronouncements
Adopted in 2020
Financial Instruments – Credit Losses: Measurement of Credit Losses on Financial Instruments
Effective January 1, 2020, we adopted, on a modified retrospective basis, new guidance on the accounting for credit losses of financial instruments that are measured at amortized cost, including held to maturity securities, and reinsurance recoverables, by applying an approach based on the current expected credit losses (CECL). The estimate of expected credit losses considers historical information, current information, as well as reasonable and supportable forecasts, including estimates of prepayments. In addition, the guidance also replaced the current available for sale (AFS) security other-than-temporary impairment model by requiring an estimate of the expected credit loss (ECL) only when the fair value is below the amortized cost of the asset. The length of time the fair value of an AFS security has been below its amortized cost no longer impacts the determination of whether a potential credit loss exists. The AFS security model also requires the use of a valuation allowance as compared to the previous practice of writing down the asset.

In 2020, we recognized a cumulative effect adjustment and decreased beginning retained earnings by $79 million pre-tax, or $72 million after-tax, principally related to the valuation allowance for credit losses. We also adopted the required disclosures within Note 3 Investments and Note 5 Reinsurance. Results for reporting periods prior to January 1, 2020 are presented in accordance with the previous guidance.

Adopted in 2021
Income Taxes - Simplifying the Accounting for Income Taxes
Effective January 1, 2021, we adopted guidance which is intended to simplify the accounting for income taxes by removing several exceptions contained in existing guidance and amending other guidance. The adoption of the new guidance did not have a material effect on our results of operations or financial condition.

Accounting guidance not yet adopted
Effects of Reference Rate Reform on Financial Reporting
In March 2020, the FASB issued guidance which provides optional expedients and exceptions for applying GAAP to investments, derivatives, or other transactions that reference the London Interbank Offered Rate (LIBOR) or another reference rate expected to be discontinued because of reference rate reform. Along with the optional expedients, the amendments include a general principle that permits an entity to consider contract modifications due to reference reform to be an event that does not require contract re-measurement at the modification date or reassessment of a previous accounting determination. Additionally, a company may make a one-time election to sell, transfer, or both sell and transfer debt securities classified as held to maturity that reference a rate affected by reference rate reform and that were classified as held to maturity before January 1, 2020. This standard may be elected over time through December 31, 2022 as reference rate reform activities occur. Our exposure to LIBOR is limited and, accordingly, we do not expect reference rate reform to have a material impact on our Consolidated Financial Statements.

Targeted Improvements to the Accounting for Long-Duration Contracts
In August 2018, the FASB issued guidance to improve the existing recognition, measurement, presentation, and disclosure requirements for long-duration contracts issued by an insurance entity. The amendments in this update require more frequent updating of assumptions and a standardized discount rate for the future policy benefit liability, a requirement to use the fair value measurement model for policies with market risk benefits, simplified amortization of deferred acquisition costs, and enhanced disclosures. This standard will be effective in the first quarter of 2023 with early adoption permitted. We are currently assessing the effect of adopting this guidance on our financial condition and results of operations. We will be better able to quantify the effect of adopting this standard as we progress in our implementation process and draw nearer to the date of adoption.
v3.20.4
Acquisitions (Notes)
12 Months Ended
Dec. 31, 2020
Acquisitions [Abstract]  
Mergers, Acquisitions and Dispositions Disclosures [Text Block] Acquisitions
Huatai Group
Chubb maintains a direct investment in Huatai Insurance Group Co., Ltd. (Huatai Group). Huatai Group is the parent company of, and owns 100 percent of, Huatai Property & Casualty Insurance Co., Ltd. (Huatai P&C), approximately 80 percent of Huatai Life Insurance Co., Ltd. (Huatai Life), and approximately 82 percent of Huatai Asset Management Co., Ltd. (collectively, Huatai). Huatai Group's insurance operations have more than 600 branches and 11 million customers in China.

In 2019, Chubb entered into agreements to acquire an additional 22.4 percent ownership in Huatai Group through two separate purchases, a 15.3 percent ownership interest for approximately $1.1 billion and a 7.1 percent ownership interest for approximately $493 million. On July 13, 2020, we completed the 15.3 percent purchase. The purchase of the additional 7.1 percent ownership interest is contingent upon important conditions.

In connection with these purchase agreements, we paid $1.6 billion, including a collateralized deposit for the 7.1 percent tranche, in 2020. These transactions are recorded within investing activities on the Consolidated statement of cash flows.

Separately, in November 2020, we completed the purchase of an incremental 0.9 percent ownership interest in Huatai Group for approximately $65 million.

As of December 31, 2020, Chubb's aggregate ownership interest in Huatai Group was approximately 47.1 percent. Chubb applies the equity method of accounting to its investment in Huatai Group by recording its share of net income or loss in Other (income) expense in the Consolidated statements of operations. Refer to Note 14 for additional information. The Consolidated statements of operations include the equity income from the additional ownership interests as of each respective closing date.
Upon completion of the 7.1 percent purchase, which will result in majority ownership of Huatai Group, Chubb is expected to obtain control of Huatai. At that time, Chubb is expected to apply consolidation accounting and discontinue the application of the equity method of accounting. 

Prior year acquisition
Banchile Seguros de Vida
On December 30, 2019, we acquired Banchile Seguros de Vida, an insurance company providing both life and property and casualty coverages in Chile, for $74 million in cash. The results of this acquisition are included in the Overseas General Insurance and Life Insurance segments as appropriate, determined by the type of policy written.
v3.20.4
Investments
12 Months Ended
Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]  
Investments Investments
a) Fixed maturities
Effective January 1, 2020, we adopted new accounting guidance that requires a valuation allowance for credit losses to be established for fixed maturity securities classified as held to maturity (HTM) or available for sale (AFS).
December 31, 2020
Amortized
Cost
Valuation AllowanceGross Unrealized AppreciationGross Unrealized DepreciationFair Value
(in millions of U.S. dollars)
Available for sale
U.S. Treasury / Agency$2,471 $ $199 $ $2,670 
Non-U.S.24,594 (6)1,808 (42)26,354 
Corporate and asset-backed securities34,095 (14)2,322 (72)36,331 
Mortgage-backed securities17,456  1,022 (8)18,470 
Municipal6,572  304 (2)6,874 
$85,188 $(20)$5,655 $(124)$90,699 
Amortized CostValuation AllowanceNet Carrying ValueGross Unrealized AppreciationGross Unrealized DepreciationFair
Value
Held to maturity
U.S. Treasury / Agency$1,392 $ $1,392 $60 $ $1,452 
Non-U.S.1,295 (7)1,288 118 (1)1,405 
Corporate and asset-backed securities2,185 (35)2,150 288  2,438 
Mortgage-backed securities2,000 (1)1,999 148 (1)2,146 
Municipal4,825 (1)4,824 245  5,069 
$11,697 $(44)$11,653 $859 $(2)$12,510 
December 31, 2019Amortized
Cost
Gross
Unrealized
Appreciation
Gross
Unrealized
Depreciation
Fair
Value
OTTI Recognized
in AOCI
(in millions of U.S. dollars)
Available for sale
U.S. Treasury / Agency$3,188 $96 $(1)$3,283 $— 
Non-U.S.22,670 1,099 (62)23,707 (25)
Corporate and asset-backed securities30,689 1,180 (78)31,791 (5)
Mortgage-backed securities18,712 494 (14)19,192 — 
Municipal7,321 205 (11)7,515 — 
$82,580 $3,074 $(166)$85,488 $(30)
Held to maturity
U.S. Treasury / Agency$1,318 $29 $— $1,347 $— 
Non-U.S.1,423 62 — 1,485 — 
Corporate and asset-backed securities2,349 121 (2)2,468 — 
Mortgage-backed securities2,331 65 — 2,396 — 
Municipal5,160 150 (1)5,309 — 
$12,581 $427 $(3)$13,005 $— 
The following table presents the amortized cost of our HTM securities according to S&P rating:

December 31, 2020
(in millions of U.S. dollars)Amortized cost% of Total
AAA$2,511 22 %
AA6,193 53 %
A2,138 18 %
BBB826 7 %
BB28  %
Other1  %
Total$11,697 100 %

The following table presents fixed maturities by contractual maturity:

December 31December 31
20202019 
(in millions of U.S. dollars)Net Carrying ValueFair ValueAmortized CostFair Value
Available for sale
Due in 1 year or less$4,760 $4,760 $3,951 $3,973 
Due after 1 year through 5 years26,227 26,227 27,142 27,720 
Due after 5 years through 10 years27,232 27,232 23,901 24,874 
Due after 10 years14,010 14,010 8,874 9,729 
72,229 72,229 63,868 66,296 
Mortgage-backed securities18,470 18,470 18,712 19,192 
$90,699 $90,699 $82,580 $85,488 
Held to maturity
Due in 1 year or less$1,231 $1,240 $478 $479 
Due after 1 year through 5 years3,592 3,760 3,869 3,940 
Due after 5 years through 10 years3,029 3,228 3,756 3,883 
Due after 10 years1,802 2,136 2,147 2,307 
9,654 10,364 10,250 10,609 
Mortgage-backed securities1,999 2,146 2,331 2,396 
$11,653 $12,510 $12,581 $13,005 

Expected maturities could differ from contractual maturities because borrowers may have the right to call or prepay obligations, with or without call or prepayment penalties. 
b) Gross unrealized loss
Fixed maturities in an unrealized loss position at December 31, 2020, comprised both investment grade and below investment grade securities for which fair value declined primarily due to widening credit spreads since the date of purchase.

The following table presents, for AFS fixed maturities in an unrealized loss position (including securities on loan) that are not deemed to have credit losses, the aggregate fair value and gross unrealized loss by length of time the security has continuously been in an unrealized loss position:
 0 – 12 MonthsOver 12 MonthsTotal
December 31, 2020Fair ValueGross
Unrealized Loss
Fair ValueGross
Unrealized Loss
Fair ValueGross
Unrealized Loss
(in millions of U.S. dollars)
Non-U.S.$1,628 $(35)$114 $(5)$1,742 $(40)
Corporate and asset-backed securities2,212 (33)593 (14)2,805 (47)
Mortgage-backed securities875 (6)35 (2)910 (8)
Municipal
40 (1)16 (1)56 (2)
Total AFS fixed maturities$4,755 $(75)$758 $(22)$5,513 $(97)

The following table presents, for all securities in an unrealized loss position (including securities on loan), the aggregate fair value and gross unrealized loss by length of time the security has continuously been in an unrealized loss position: 
 0 – 12 MonthsOver 12 MonthsTotal
December 31, 2019Fair ValueGross
Unrealized Loss
Fair ValueGross
Unrealized Loss
Fair ValueGross
Unrealized Loss
(in millions of U.S. dollars)
U.S. Treasury / Agency$234 $(1)$339 $— $573 $(1)
Non-U.S.1,846 (34)802 (28)2,648 (62)
Corporate and asset-backed securities2,121 (40)988 (40)3,109 (80)
Mortgage-backed securities1,174 (6)932 (8)2,106 (14)
Municipal
188 — 276 (12)464 (12)
Total fixed maturities$5,563 $(81)$3,337 $(88)$8,900 $(169)

c) Net realized gains (losses)
The following table presents a roll-forward of pre-tax credit losses related to fixed maturities for which a portion of OTTI was recognized in OCI: 
Year Ended December 31
(in millions of U.S. dollars)20192018
Balance of credit losses related to securities still held – beginning of year$34 $22 
Additions where no OTTI was previously recorded33 20 
Additions where an OTTI was previously recorded
Reductions for securities sold during the period(41)(13)
Balance of credit losses related to securities still held – end of year$30 $34 
The following table presents the components of Net realized gains (losses) and the change in net unrealized appreciation (depreciation) of investments:
 Year Ended December 31
(in millions of U.S. dollars)202020192018
Fixed maturities:
OTTI on fixed maturities, gross$ $(90)$(52)
OTTI on fixed maturities recognized in OCI (pre-tax) 32 
OTTI on fixed maturities, net (58)(49)
Gross realized gains excluding OTTI244 203 334 
Gross realized losses excluding OTTI(366)(176)(587)
Recovery of expected credit losses11 — — 
Impairment (1)
(170)— — 
Total fixed maturities(281)(31)(302)
Equity securities586 104 (59)
Other investments (32)(20)(5)
Foreign exchange gains (losses)(483)131 
Investment and embedded derivative instruments81 (435)(75)
Fair value adjustments on insurance derivative(202)(4)(248)
S&P futures(108)(138)(4)
Other derivative instruments1 (8)(3)
Other(60)(5)(87)
Net realized gains (losses) (pre-tax)
$(498)$(530)$(652)
Change in net unrealized appreciation (depreciation) on investments (pre-tax):
Fixed maturities available for sale$2,628 $3,769 $(1,958)
Fixed maturities held to maturity(24)(31)(38)
Other(12)(3)— 
Income tax (expense) benefit(462)(647)297 
Change in net unrealized appreciation (depreciation) on investments (after-tax)$2,130 $3,088 $(1,699)
(1)Relates to certain securities we intended to sell and securities written to market entering default.

Realized gains and losses from Equity securities and Other investments from the table above include sales of securities and unrealized gains and losses from fair value changes as follows:

Year Ended December 31, 2020Year Ended December 31, 2019Year Ended December 31, 2018
(in millions of U.S. dollars)Equity SecuritiesOther InvestmentsTotalEquity SecuritiesOther InvestmentsTotalEquity SecuritiesOther InvestmentsTotal
Net gains (losses) recognized during the period$586 $(32)$554 $104 $(20)$84 $(59)$(5)$(64)
Less: Net gains (losses) recognized from sales of securities455  455 58 (5)53 70 121 191 
Unrealized gains (losses) recognized for securities still held at reporting date$131 $(32)$99 $46 $(15)$31 $(129)$(126)$(255)
The following table presents a roll-forward of valuation allowance for expected credit losses on fixed maturities:
Year Ended
December 31
(in millions of U.S. dollars)2020
Available for sale
Valuation allowance for expected credit losses - beginning of period$ 
Impact of adoption of new accounting guidance25 
Provision for expected credit loss188 
Initial allowance for purchased securities with credit deterioration5 
Write-offs charged against the expected credit loss(5)
Recovery of expected credit loss(193)
Valuation allowance for expected credit losses - end of period$20 
Held to maturity
Valuation allowance for expected credit losses - beginning of period$ 
Impact of adoption of new accounting guidance44 
Provision for expected credit loss9 
Recovery of expected credit loss(9)
Valuation allowance for expected credit losses - end of period$44 

Purchased Credit Deterioration (PCD) Securities
During the year ended December 31, 2020, we purchased $108 million of securities with credit deterioration, categorized as available for sale, and assessed an allowance for expected credit losses of $5 million at acquisition. These PCD securities had a par value at acquisition of $144 million.
d) Other investments
December 31
(in millions of U.S. dollars)20202019
Alternative investments:
Partially-owned investment companies$5,969 $4,142 
Limited partnerships547 508 
Investment funds254 271 
Alternative investments6,770 4,921 
Life insurance policies438 377 
Policy loans233 247 
Non-qualified separate account assets (1)
316 283 
Other188 234 
Total$7,945 $6,062 
(1)Non-qualified separate account assets are comprised of mutual funds, supported by assets that do not qualify for separate account reporting under GAAP.
Alternative investments
Alternative investments include partially-owned investment companies, investment funds, and limited partnerships measured at fair value using net asset value (NAV) as a practical expedient. The following table presents, by investment category, the expected liquidation period, fair value, and maximum future funding commitments of alternative investments: 
December 31