Cover page - shares	6 Months Ended
Cover page - shares	Jul. 31, 2020	Aug. 31, 2020
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jul. 31, 2020
Document Transition Report	false
Entity File Number	001-6991
Entity Registrant Name	WALMART INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	71-0415188
Entity Address, Address Line One	702 S.W. 8th Street
Entity Address, City or Town	Bentonville
Entity Address, State or Province	AR
Entity Address, Postal Zip Code	72716
City Area Code	479
Local Phone Number	273-4000
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 Common Stock, Shares Outstanding		2,833,752,938
Entity Central Index Key	0000104169
Current Fiscal Year End Date	--01-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q2
Amendment Flag	false
Common Stock, par value $0.10 per share
Document Information [Line Items]
Title of 12(b) Security	Common Stock, par value $0.10 per share
Trading Symbol	WMT
Security Exchange Name	NYSE
1.900% Notes Due 2022
Document Information [Line Items]
Title of 12(b) Security	1.900% Notes Due 2022
Trading Symbol	WMT22
Security Exchange Name	NYSE
2.550% Notes Due 2026
Document Information [Line Items]
Title of 12(b) Security	2.550% Notes Due 2026
Trading Symbol	WMT26
Security Exchange Name	NYSE

Condensed Consolidated Statements of Income (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Revenues:
Net sales	$ 136,824	$ 129,388	$ 270,496	$ 252,337
Membership and other income	918	989	1,868	1,965
Total revenues	137,742	130,377	272,364	254,302
Costs and expenses:
Cost of sales	102,689	97,923	204,715	190,957
Operating, selling, general and administrative expenses	28,994	26,871	56,366	52,817
Operating income	6,059	5,583	11,283	10,528
Interest:
Debt	577	558	1,087	1,146
Finance lease	81	83	163	168
Interest income	(23)	(56)	(66)	(104)
Interest, net	635	585	1,184	1,210
Other (gains) and losses	(3,222)	85	(3,943)	(752)
Income before income taxes	8,646	4,913	14,042	10,070
Provision for income taxes	2,207	1,233	3,529	2,484
Consolidated net income	6,439	3,680	10,513	7,586
Consolidated net (income) loss attributable to noncontrolling interest	37	(70)	(47)	(134)
Consolidated net income attributable to Walmart	$ 6,476	$ 3,610	$ 10,466	$ 7,452
Net income per common share:
Basic net income per common share attributable to Walmart (in dollars per share)	$ 2.29	$ 1.27	$ 3.70	$ 2.60
Diluted net income per common share attributable to Walmart (in dollars per share)	$ 2.27	$ 1.26	$ 3.67	$ 2.59
Weighted-average common shares outstanding:
Basic (shares)	2,832	2,853	2,832	2,861
Diluted (shares)	2,848	2,869	2,848	2,878
Dividends declared per common share (in dollars per share)	$ 0	$ 0	$ 2.16	$ 2.12

Condensed Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Statement of Comprehensive Income [Abstract]
Consolidated net income	$ 6,439	$ 3,680	$ 10,513	$ 7,586
Consolidated net (income) loss attributable to noncontrolling interest	37	(70)	(47)	(134)
Consolidated net income attributable to Walmart	6,476	3,610	10,466	7,452
Other comprehensive income (loss), net of income taxes
Currency translation and other	298	(81)	(3,670)	426
Net investment hedges	(191)	140	(34)	248
Cash flow hedges	313	(158)	34	(289)
Minimum pension liability	16	4	31	5
Other Comprehensive Income (Loss), Net of Tax	436	(95)	(3,639)	390
Other comprehensive (income) loss attributable to noncontrolling interest	(52)	(84)	660	(118)
Other comprehensive income (loss) attributable to Walmart	384	(179)	(2,979)	272
Comprehensive income, net of income taxes	6,875	3,585	6,874	7,976
Comprehensive (income) loss attributable to noncontrolling interest	(15)	(154)	613	(252)
Comprehensive income attributable to Walmart	$ 6,860	$ 3,431	$ 7,487	$ 7,724

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Jul. 31, 2020	Jan. 31, 2020	Jul. 31, 2019
Current assets:
Cash and cash equivalents	$ 16,906	$ 9,465	$ 9,283
Receivables, net	5,111	6,284	5,382
Inventories	41,084	44,435	44,134
Prepaid expenses and other	1,895	1,622	2,572
Total current assets	64,996	61,806	61,371
Property and equipment, net	101,182	105,208	104,674
Operating lease right-of-use assets	16,869	17,424	17,239
Finance lease right-of-use assets, net	4,843	4,417	3,949
Goodwill	29,542	31,073	31,454
Other long-term assets	19,950	16,567	16,174
Total assets	237,382	236,495	234,861
Current liabilities:
Short-term borrowings	357	575	3,681
Accounts payable	46,326	46,973	45,871
Dividends payable	3,060	0	3,023
Accrued liabilities	23,768	22,296	20,691
Accrued income taxes	610	280	387
Long-term debt due within one year	5,553	5,362	4,396
Operating lease obligations due within one year	1,734	1,793	1,795
Finance lease obligations due within one year	549	511	439
Total current liabilities	81,957	77,790	80,283
Long-term debt	40,959	43,714	44,404
Long-term operating lease obligations	15,669	16,171	16,079
Long-term finance lease obligations	4,673	4,307	3,915
Deferred income taxes and other	12,927	12,961	13,049
Commitments and contingencies
Equity:
Common stock	283	284	285
Capital in excess of par value	3,197	3,247	2,880
Retained earnings	87,614	83,943	78,432
Accumulated other comprehensive loss	(15,784)	(12,805)	(11,270)
Total Walmart shareholders' equity	75,310	74,669	70,327
Noncontrolling interest	5,887	6,883	6,804
Total equity	81,197	81,552	77,131
Total liabilities and equity	$ 237,382	$ 236,495	$ 234,861

Condensed Consolidated Statement Of Shareholders' Equity (Unaudited) - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Capital in excess of par value	Retained earnings	Accumulated other comprehensive loss	Total Walmart shareholders' equity	Noncontrolling interest
Beginning balance (in shares) at Jan. 31, 2019		2,878
Beginning balance at Jan. 31, 2019	$ 79,634	$ 288	$ 2,965	$ 80,785	$ (11,542)	$ 72,496	$ 7,138
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Adoption of new accounting standards on February 1, 2019, net of income taxes	(300)			(266)		(266)	(34)
Consolidated net income	3,906			3,842		3,842	64
Other comprehensive income (loss), net of income taxes	485				451	451	34
Dividends declared	(6,071)			(6,071)		(6,071)
Purchase of Company stock (in shares)		(21)
Purchase of Company stock	(2,087)	$ (2)	(73)	(2,012)		(2,087)
Dividends declared to noncontrolling interest	(481)						(481)
Other (in shares)		5
Other	(176)		(158)	(2)		(160)	(16)
Ending balance (in shares) at Apr. 30, 2019		2,862
Ending balance at Apr. 30, 2019	74,910	$ 286	2,734	76,276	(11,091)	68,205	6,705
Beginning balance (in shares) at Jan. 31, 2019		2,878
Beginning balance at Jan. 31, 2019	79,634	$ 288	2,965	80,785	(11,542)	72,496	7,138
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net income	7,586
Other comprehensive income (loss), net of income taxes	390
Ending balance (in shares) at Jul. 31, 2019		2,847
Ending balance at Jul. 31, 2019	77,131	$ 285	2,880	78,432	(11,270)	70,327	6,804
Beginning balance (in shares) at Apr. 30, 2019		2,862
Beginning balance at Apr. 30, 2019	74,910	$ 286	2,734	76,276	(11,091)	68,205	6,705
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net income	3,680			3,610		3,610	70
Other comprehensive income (loss), net of income taxes	(95)				(179)	(179)	84
Dividends declared	15			15		15
Purchase of Company stock (in shares)		(15)
Purchase of Company stock	(1,555)	$ (2)	(54)	(1,499)		(1,555)
Dividends declared to noncontrolling interest	6						6
Other	170	$ 1	200	30		231	(61)
Ending balance (in shares) at Jul. 31, 2019		2,847
Ending balance at Jul. 31, 2019	77,131	$ 285	2,880	78,432	(11,270)	70,327	6,804
Beginning balance (in shares) at Jan. 31, 2020		2,832
Beginning balance at Jan. 31, 2020	81,552	$ 284	3,247	83,943	(12,805)	74,669	6,883
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net income	4,074			3,990		3,990	84
Other comprehensive income (loss), net of income taxes	(4,075)				(3,363)	(3,363)	(712)
Dividends declared	(6,117)			(6,117)		(6,117)
Purchase of Company stock (in shares)		(6)
Purchase of Company stock	(693)	$ (1)	(26)	(666)		(693)
Dividends declared to noncontrolling interest	(359)						(359)
Other (in shares)		6
Other	(272)	$ 1	(238)	(9)		(246)	(26)
Ending balance (in shares) at Apr. 30, 2020		2,832
Ending balance at Apr. 30, 2020	74,110	$ 284	2,983	81,141	(16,168)	68,240	5,870
Beginning balance (in shares) at Jan. 31, 2020		2,832
Beginning balance at Jan. 31, 2020	81,552	$ 284	3,247	83,943	(12,805)	74,669	6,883
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net income	10,513
Other comprehensive income (loss), net of income taxes	(3,639)
Ending balance (in shares) at Jul. 31, 2020		2,834
Ending balance at Jul. 31, 2020	81,197	$ 283	3,197	87,614	(15,784)	75,310	5,887
Beginning balance (in shares) at Apr. 30, 2020		2,832
Beginning balance at Apr. 30, 2020	74,110	$ 284	2,983	81,141	(16,168)	68,240	5,870
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Consolidated net income	6,439			6,476		6,476	(37)
Other comprehensive income (loss), net of income taxes	436				384	384	52
Dividends declared to noncontrolling interest	(3)						(3)
Other (in shares)		2
Other	215	$ (1)	214	(3)		210	5
Ending balance (in shares) at Jul. 31, 2020		2,834
Ending balance at Jul. 31, 2020	$ 81,197	$ 283	$ 3,197	$ 87,614	$ (15,784)	$ 75,310	$ 5,887

Consolidated Statement Of Shareholders' Equity (Parenthetical) - $ / shares	3 Months Ended		6 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Statement of Stockholders' Equity [Abstract]
Dividends declared (in dollars per share)	$ 0	$ 0	$ 2.16	$ 2.12

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jul. 31, 2020	Jul. 31, 2019
Cash flows from operating activities:
Consolidated net income	$ 10,513	$ 7,586
Adjustments to reconcile consolidated net income to net cash provided by operating activities:
Depreciation and amortization	5,562	5,436
Unrealized (gains) and losses	(4,006)	(731)
Loss on disposal of business operations	37	0
Deferred income taxes	472	241
Other operating activities	305	348
Changes in certain assets and liabilities, net of effects of acquisitions and dispositions:
Receivables, net	823	978
Inventories	2,466	220
Accounts payable	1,052	(1,242)
Accrued liabilities	1,428	(1,657)
Accrued income taxes	304	6
Net cash provided by operating activities	18,956	11,185
Cash flows from investing activities:
Payments for property and equipment	(3,569)	(4,871)
Proceeds from the disposal of property and equipment	83	128
Proceeds from the disposal of certain operations	0	833
Payments for business acquisitions, net of cash acquired	(175)	(56)
Other investing activities	27	142
Net cash used in investing activities	(3,634)	(3,824)
Cash flows from financing activities:
Net change in short-term borrowings	(178)	(1,564)
Proceeds from issuance of long-term debt	0	4,020
Repayments of long-term debt	(2,937)	(407)
Dividends paid	(3,058)	(3,036)
Purchase of Company stock	(723)	(3,707)
Dividends paid to noncontrolling interest	(66)	(259)
Other financing activities	(852)	(578)
Net cash used in financing activities	(7,814)	(5,531)
Effect of exchange rates on cash, cash equivalents and restricted cash	(69)	(266)
Net increase in cash, cash equivalents and restricted cash	7,439	1,564
Cash, cash equivalents and restricted cash at beginning of year	9,515	7,756
Cash, cash equivalents and restricted cash at end of period	$ 16,954	$ 9,320

Summary of Significant Accounting Policies (Notes)	6 Months Ended
Summary of Significant Accounting Policies (Notes)	Jul. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Summary of Significant Accounting Policies	Summary of Significant Accounting Policies Basis of Presentation The Condensed Consolidated Financial Statements of Walmart Inc. and its subsidiaries ("Walmart" or the "Company") and the accompanying notes included in this Quarterly Report on Form 10-Q are unaudited. In the opinion of management, all adjustments necessary for the fair presentation of the Condensed Consolidated Financial Statements have been included. Such adjustments are of a normal, recurring nature. The Condensed Consolidated Financial Statements, and the accompanying notes, are prepared in accordance with generally accepted accounting principles in the United States ("GAAP") and do not contain certain information included in the Company's Annual Report on Form 10-K for the fiscal year ended January 31, 2020 ("fiscal 2020"). Therefore, the interim Condensed Consolidated Financial Statements should be read in conjunction with that Annual Report on Form 10-K. The Company's Consolidated Financial Statements are based on a fiscal year ending January 31 for the United States ("U.S.") and Canadian operations. The Company consolidates all other operations generally using a one-month lag and based on a calendar year. There were no significant intervening events during the month of July related to the operations consolidated using a lag that materially affected the Condensed Consolidated Financial Statements. The Company's business is seasonal to a certain extent due to calendar events and national and religious holidays, as well as weather patterns. Historically, the Company's highest sales volume and operating income have occurred in the fiscal quarter ending January 31. Use of Estimates The Consolidated Financial Statements have been prepared in conformity with GAAP. Those principles require management to make estimates and assumptions, including potential impacts arising from the COVID-19 pandemic and related government actions, that affect the reported amounts of assets and liabilities. Management's estimates and assumptions also affect the 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. Actual results may differ materially from those estimates. Receivables In June 2016, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) 2016-13, Financial Instruments–Credit Losses (Topic 326), which modifies the measurement of expected credit losses of certain financial instruments. The Company adopted this ASU on February 1, 2020 with no material impact to the Company's Condensed Consolidated Financial Statements. Receivables are stated at their carrying values, net of a reserve for credit losses, and are primarily due from the following: customers, which also includes insurance companies resulting from pharmacy sales, banks for customer credit, debit cards and electronic transfer transactions that take in excess of seven days to process; suppliers for marketing or incentive programs; governments for income taxes; and real estate transactions.

Net Income Per Common Share (Notes)

6 Months Ended

Jul. 31, 2020

Earnings Per Share [Abstract]

Net Income Per Common Share

Basic net income per common share attributable to Walmart is based on the weighted-average common shares outstanding during the relevant period. Diluted net income per common share attributable to Walmart is based on the weighted-average common shares outstanding during the relevant period adjusted for the dilutive effect of share-based awards. The Company did not have significant share-based awards outstanding that were anti-dilutive and not included in the calculation of diluted net income per common share attributable to Walmart for the three and six months ended July 31, 2020 and 2019.

The following table provides a reconciliation of the numerators and denominators used to determine basic and diluted net income per common share attributable to Walmart:



	Three Months Ended July 31,					Six Months Ended July 31,
(Amounts in millions, except per share data)	2020		2019			2020			2019
Numerator
Consolidated net income	$	6,439	$	3,680		$	10,513		$	7,586
Consolidated net (income) loss attributable to noncontrolling interest	37		(70		)	(47		)	(134		)
Consolidated net income attributable to Walmart	$	6,476	$	3,610		$	10,466		$	7,452

Denominator
Weighted-average common shares outstanding, basic	2,832		2,853			2,832			2,861
Dilutive impact of share-based awards	16		16			16			17
Weighted-average common shares outstanding, diluted	2,848		2,869			2,848			2,878

Net income per common share attributable to Walmart
Basic	$	2.29	$	1.27		$	3.70		$	2.60
Diluted	2.27		1.26			3.67			2.59

Accumulated Other Comprehensive Loss (Notes)

6 Months Ended

Jul. 31, 2020

Other Comprehensive Income (Loss), Tax [Abstract]

Accumulated Other Comprehensive Loss

The following table provides the changes in the composition of total accumulated other comprehensive loss for the three months ended April 30, 2020 and July 31, 2020, respectively:



(Amounts in millions and net of immaterial income taxes)	Currency Translation and Other			Net Investment Hedges			Cash Flow Hedges			Minimum Pension Liability			Total
Balances as of February 1, 2020	$	(11,827	)	$	1,517		$	(539	)	$	(1,956	)	$	(12,805	)
Other comprehensive income (loss) before reclassifications, net	(3,256		)	157			(295		)	(4		)	(3,398		)
Reclassifications to income, net	—			—			16			19			35
Balances as of April 30, 2020	$	(15,083	)	$	1,674		$	(818	)	$	(1,941	)	$	(16,168	)
Other comprehensive income (loss) before reclassifications, net	246			(191		)	303			(2		)	356
Reclassifications to income, net	—			—			10			18			28
Balances as of July 31, 2020	$	(14,837	)	$	1,483		$	(505	)	$	(1,925	)	$	(15,784	)

The following table provides the changes in the composition of total accumulated other comprehensive loss for the three months ended April 30, 2019 and July 31, 2019, respectively:



(Amounts in millions and net of immaterial income taxes)	Currency Translation and Other			Net Investment Hedges		Cash Flow Hedges			Minimum Pension Liability			Total
Balances as of February 1, 2019	$	(12,085	)	$	1,395	$	(140	)	$	(712	)	$	(11,542	)
Other comprehensive income (loss) before reclassifications, net	496			108		(145		)	(7		)	452
Reclassifications to income, net	(23		)	—		14			8			(1		)
Balances as of April 30, 2019	$	(11,612	)	$	1,503	$	(271	)	$	(711	)	$	(11,091	)
Other comprehensive income (loss) before reclassifications, net	(165		)	140		(172		)	(5		)	(202		)
Reclassifications to income, net	—			—		14			9			23
Balances as of July 31, 2019	$	(11,777	)	$	1,643	$	(429	)	$	(707	)	$	(11,270	)

Amounts reclassified from accumulated other comprehensive loss to net income for derivative instruments are recorded in interest, net, in the Company's Condensed Consolidated Statements of Income. Amounts reclassified from accumulated other comprehensive loss to net income for the minimum pension liability, as well as the cumulative translation resulting from the disposition of a business, are recorded in other gains and losses in the Company's Condensed Consolidated Statements of Income. Amounts related to the Company's derivatives expected to be reclassified from accumulated other comprehensive loss to net income during the next 12 months are not significant.

Short-term Borrowings and Long-term Debt (Notes)

6 Months Ended

Jul. 31, 2020

Debt Disclosure [Abstract]

Short-term Borrowings and Long-term Debt

The Company has various committed lines of credit in the U.S. that are used to support its commercial paper program. In April 2020, the Company renewed and extended its existing 364-day revolving credit facility of $10.0 billion. In total, the Company had committed lines of credit in the U.S. of $15.0 billion at July 31, 2020 and January 31, 2020, all undrawn.

The following table provides the changes in the Company's long-term debt for the six months ended July 31, 2020:



(Amounts in millions)	Long-term debt due within one year			Long-term debt			Total
Balances as of February 1, 2020	$	5,362		$	43,714		$	49,076
Repayments of long-term debt	(2,937		)	—			(2,937		)
Reclassifications of long-term debt	3,125			(3,125		)	—
Other	3			370			373
Balances as of July 31, 2020	$	5,553		$	40,959		$	46,512

Fair Value Measurements (Notes)

6 Months Ended

Jul. 31, 2020

Fair Value Disclosures [Abstract]

Fair Value Measurements

Assets and liabilities recorded at fair value are measured using the fair value hierarchy, which prioritizes the inputs used in measuring fair value. The levels of the fair value hierarchy are:


•	Level 1: observable inputs such as quoted prices in active markets;


•	Level 2: inputs other than quoted prices in active markets that are either directly or indirectly observable; and


•	Level 3: unobservable inputs for which little or no market data exists, therefore requiring the Company to develop its own assumptions.

The Company measures the fair value of equity investments (primarily its investment in JD.com) on a recurring basis and records them in other long-term assets in the accompanying Condensed Consolidated Balance Sheets.

The fair value of the Company's equity investments are as follows:



(Amounts in millions)	Fair Value as of July 31, 2020		Fair Value as of January 31, 2020
Equity investments measured using Level 1 inputs	$	4,689	$	2,715
Equity investments measured using Level 2 inputs	5,204		2,723
Total	$	9,893	$	5,438

Derivatives

The Company also has derivatives recorded at fair value. Derivative fair values are the estimated amounts the Company would receive or pay upon termination of the related derivative agreements as of the reporting dates. The fair values have been measured using the income approach and Level 2 inputs, which include the relevant interest rate and foreign currency forward curves. As of July 31, 2020 and January 31, 2020, the notional amounts and fair values of these derivatives were as follows:



	July 31, 2020						January 31, 2020
(Amounts in millions)	Notional Amount		Fair Value				Notional Amount		Fair Value
Receive fixed-rate, pay variable-rate interest rate swaps designated as fair value hedges	$	4,000	$	205		⁽¹⁾	$	4,000	$	97		⁽¹⁾
Receive fixed-rate, pay fixed-rate cross-currency swaps designated as net investment hedges	3,500		471			⁽¹⁾	3,750		455			⁽¹⁾
Receive fixed-rate, pay fixed-rate cross-currency swaps designated as cash flow hedges	4,271		(748		)	⁽²⁾	4,067		(696		)	⁽²⁾
Total	$	11,771	$	(72	)		$	11,817	$	(144	)


⁽¹⁾	Classified in Other long-term assets within the Company's Condensed Consolidated Balance Sheets.


⁽²⁾	Classified in Deferred income taxes and other within the Company's Condensed Consolidated Balance Sheets.

Nonrecurring Fair Value Measurements

In addition to assets and liabilities that are recorded at fair value on a recurring basis, the Company's assets and liabilities are also subject to nonrecurring fair value measurements. Generally, assets are recorded at fair value on a nonrecurring basis as a result of impairment charges. The Company did not have any material assets or liabilities subject to nonrecurring fair value measurements as of July 31, 2020.

Other Fair Value Disclosures

The Company records cash and cash equivalents, restricted cash, and short-term borrowings at cost. The carrying values of these instruments approximate their fair value due to their short-term maturities.

The Company's long-term debt is also recorded at cost. The fair value is estimated using Level 2 inputs based on the Company's current incremental borrowing rate for similar types of borrowing arrangements. The carrying value and fair value of the Company's long-term debt as of July 31, 2020 and January 31, 2020, are as follows:



	July 31, 2020				January 31, 2020
(Amounts in millions)	Carrying Value		Fair Value		Carrying Value		Fair Value
Long-term debt, including amounts due within one year	$	46,512	$	58,357	$	49,076	$	57,769

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Contingencies (Notes)	6 Months Ended
Contingencies (Notes)	Jul. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Contingencies	Contingencies Legal Proceedings The Company is involved in a number of legal proceedings. The Company has made accruals with respect to these matters, where appropriate, which are reflected in the Company's Condensed Consolidated Financial Statements. For some matters, a liability is not probable or the amount cannot be reasonably estimated and therefore an accrual has not been made. However, where a liability is reasonably possible and may be material, such matters have been disclosed. The Company may enter into discussions regarding settlement of these matters, and may enter into settlement agreements, if it believes settlement is in the best interest of the Company and its shareholders. Unless stated otherwise, the matters discussed below, if decided adversely or settled by the Company, individually or in the aggregate, may result in a liability material to the Company's financial condition, results of operations or cash flows. ASDA Equal Value Claims ASDA Stores Ltd. ("Asda"), a wholly-owned subsidiary of the Company, is a defendant in over 40,000 equal value ("Equal Value") claims that began in 2008 and are proceeding before an Employment Tribunal in Manchester (the "Employment Tribunal") in the United Kingdom ("U.K.") on behalf of current and former Asda store employees, and further claims may be asserted in the future. The claimants allege that the work performed by employees in Asda's retail stores is of equal value in terms of, among other things, the demands of their jobs compared to that of employees working in Asda's warehouse and distribution facilities, and that the difference in pay between these job positions disparately impacts women because more women work in retail stores while more men work in warehouses and distribution facilities, and that the pay difference is not objectively justified. The claimants are requesting differential back pay based on higher wage rates in the warehouse and distribution facilities and higher wage rates on a prospective basis. In October 2016, following a preliminary hearing, the Employment Tribunal ruled that claimants could compare their positions in Asda's retail stores with those of employees in Asda's warehouse and distribution facilities. Asda appealed the ruling and the oral argument was held before the Supreme Court of the United Kingdom in July 2020. The Company is awaiting a decision. Notwithstanding the appeal, claimants are proceeding in the next phase of their claims. That phase will determine whether the work performed by the claimants is of equal value to the work performed by employees in Asda's warehouse and distribution facilities. At present, the Company cannot predict the number of such claims that may be filed, and cannot reasonably estimate any loss or range of loss that may arise from these proceedings. Accordingly, the Company can provide no assurance as to the scope and outcomes of these matters and no assurance as to whether its business, financial position, results of operations or cash flows will not be materially adversely affected. The Company believes it has substantial factual and legal defenses to these claims, and intends to defend the claims vigorously. Prescription Opiate Litigation and Other Matters In December 2017, the U.S. Judicial Panel on Multidistrict Litigation consolidated numerous lawsuits filed against a wide array of defendants by various plaintiffs, including counties, cities, healthcare providers, Native American tribes, individuals, and third-party payors, asserting claims generally concerning the impacts of widespread opioid abuse. The consolidated multidistrict litigation entitled In re National Prescription Opiate Litigation (MDL No. 2804), is pending in the U.S. District Court for the Northern District of Ohio. The Company is named as a defendant in some of the cases included in this multidistrict litigation. Similar cases that name the Company have also been filed in state courts by state, local and tribal governments, health care providers and other plaintiffs. Plaintiffs are seeking compensatory and punitive damages, as well as injunctive relief including abatement. The Company cannot predict the number of such claims that may be filed, but believes it has substantial factual and legal defenses to these claims, and intends to defend the claims vigorously. The Company has also been responding to subpoenas, information requests and investigations from governmental entities related to nationwide controlled substance dispensing and distribution practices involving opioids. The Company cannot reasonably estimate any loss or range of loss that may arise from these matters. Accordingly, the Company can provide no assurance as to the scope and outcome of these matters and no assurance as to whether its business, financial position, results of operations or cash flows will not be materially adversely affected.

Segments and Disaggregated Revenue (Notes)

6 Months Ended

Jul. 31, 2020

Segment Reporting Information, Profit (Loss) [Abstract]

Segments and Disaggregated Revenue

Segments

The Company is engaged in the operation of retail, wholesale and other units, as well as eCommerce websites, located throughout the U.S., Africa, Argentina, Canada, Central America, Chile, China, India, Japan, Mexico, and the United Kingdom. The Company's operations are conducted in three reportable segments: Walmart U.S., Walmart International and Sam's Club. The Company defines its segments as those operations whose results the chief operating decision maker ("CODM") regularly reviews to analyze performance and allocate resources. The Company sells similar individual products and services in each of its segments. It is impractical to segregate and identify revenues for each of these individual products and services.

The Walmart U.S. segment includes the Company's mass merchandising concept in the U.S., as well as eCommerce and omni-channel initiatives. The Walmart International segment consists of the Company's operations outside of the U.S., as well as eCommerce and omni-channel initiatives. The Sam's Club segment includes the warehouse membership clubs in the U.S., as well as samsclub.com and omni-channel initiatives. Corporate and support consists of corporate overhead and other items not allocated to any of the Company's segments.

The Company measures the results of its segments using, among other measures, each segment's net sales and operating income, which includes certain corporate overhead allocations. From time to time, the Company revises the measurement of each segment's operating income, including any corporate overhead allocations, as determined by the information regularly reviewed by its CODM. When the measurement of a segment changes, previous period amounts and balances are reclassified to be comparable to the current period's presentation. Beginning with the first quarter in fiscal 2021, the Company revised its definition of eCommerce net sales to include certain pharmacy transactions and, accordingly, revised prior period amounts to maintain comparability.

Net sales by segment are as follows:



	Three Months Ended July 31,				Six Months Ended July 31,
(Amounts in millions)	2020		2019		2020		2019
Net sales:
Walmart U.S.	$	93,282	$	85,200	$	182,025	$	165,544
Walmart International	27,167		29,139		56,933		57,914
Sam's Club	16,375		15,049		31,538		28,879
Net sales	$	136,824	$	129,388	$	270,496	$	252,337

Operating income by segment, as well as operating loss for corporate and support, interest, net and other gains and losses are as follows:



	Three Months Ended July 31,						Six Months Ended July 31,
(Amounts in millions)	2020			2019			2020			2019
Operating income (loss):
Walmart U.S.	$	5,057		$	4,659		$	9,359		$	8,801
Walmart International	812			893			1,618			1,631
Sam's Club	592			480			1,086			931
Corporate and support	(402		)	(449		)	(780		)	(835		)
Operating income	6,059			5,583			11,283			10,528
Interest, net	635			585			1,184			1,210
Other (gains) and losses	(3,222		)	85			(3,943		)	(752		)
Income before income taxes	$	8,646		$	4,913		$	14,042		$	10,070

Disaggregated Revenues

In the following tables, segment net sales are disaggregated by either merchandise category or by market. From time to time, the Company revises the assignment of net sales of a particular item to a merchandise category. When the assignment changes, previous period amounts are reclassified to be comparable to the current period's presentation.

In addition, net sales related to eCommerce are provided for each segment, which include omni-channel sales, where a customer initiates an order digitally and the order is fulfilled through a store or club.



(Amounts in millions)	Three Months Ended July 31,				Six Months Ended July 31,
Walmart U.S. net sales by merchandise category	2020		2019		2020		2019
Grocery	$	51,545	$	48,196	$	104,466	$	94,395
General merchandise	31,682		27,246		57,148		51,637
Health and wellness	9,154		8,949		18,754		17,888
Other categories	901		809		1,657		1,624
Total	$	93,282	$	85,200	$	182,025	$	165,544

Of Walmart U.S.'s total net sales, approximately $10.5 billion and $5.4 billion related to eCommerce for the three months ended July 31, 2020 and 2019, respectively. Approximately $18.8 billion and $10.1 billion related to eCommerce for the six months ended July 31, 2020 and 2019, respectively.



(Amounts in millions)	Three Months Ended July 31,				Six Months Ended July 31,
Walmart International net sales by market	2020		2019		2020		2019
Mexico and Central America	$	7,208	$	8,014	$	15,704	$	15,852
United Kingdom	6,698		7,316		13,830		14,393
Canada	5,127		4,635		9,413		8,758
China	2,579		2,428		5,947		5,491
Other	5,555		6,746		12,039		13,420
Total	$	27,167	$	29,139	$	56,933	$	57,914

Of Walmart International's total net sales, approximately $3.3 billion and $2.6 billion related to eCommerce for the three months ended July 31, 2020 and 2019, respectively. Approximately $6.2 billion and $5.1 billion related to eCommerce for the six months ended July 31, 2020 and 2019, respectively.



(Amounts in millions)	Three Months Ended July 31,				Six Months Ended July 31,
Sam’s Club net sales by merchandise category	2020		2019		2020		2019
Grocery and consumables	$	10,715	$	8,931	$	21,076	$	17,251
Fuel, tobacco and other categories	2,068		2,863		4,081		5,481
Home and apparel	1,953		1,763		3,233		3,193
Health and wellness	931		842		1,832		1,669
Technology, office and entertainment	708		650		1,316		1,285
Total	$	16,375	$	15,049	$	31,538	$	28,879

Of Sam's Club's total net sales, approximately $1.3 billion and $1.0 billion related to eCommerce for the three months ended July 31, 2020 and 2019, respectively. Approximately $2.3 billion and $1.7 billion related to eCommerce for the six months ended July 31, 2020 and 2019, respectively.

Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Policies)	6 Months Ended
	Jul. 31, 2020
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The Condensed Consolidated Financial Statements of Walmart Inc. and its subsidiaries ("Walmart" or the "Company") and the accompanying notes included in this Quarterly Report on Form 10-Q are unaudited. In the opinion of management, all adjustments necessary for the fair presentation of the Condensed Consolidated Financial Statements have been included. Such adjustments are of a normal, recurring nature. The Condensed Consolidated Financial Statements, and the accompanying notes, are prepared in accordance with generally accepted accounting principles in the United States ("GAAP") and do not contain certain information included in the Company's Annual Report on Form 10-K for the fiscal year ended January 31, 2020 ("fiscal 2020"). Therefore, the interim Condensed Consolidated Financial Statements should be read in conjunction with that Annual Report on Form 10-K. The Company's Consolidated Financial Statements are based on a fiscal year ending January 31 for the United States ("U.S.") and Canadian operations. The Company consolidates all other operations generally using a one-month lag and based on a calendar year. There were no significant intervening events during the month of July related to the operations consolidated using a lag that materially affected the Condensed Consolidated Financial Statements. The Company's business is seasonal to a certain extent due to calendar events and national and religious holidays, as well as weather patterns. Historically, the Company's highest sales volume and operating income have occurred in the fiscal quarter ending January 31.
Use of Estimates	Use of Estimates The Consolidated Financial Statements have been prepared in conformity with GAAP. Those principles require management to make estimates and assumptions, including potential impacts arising from the COVID-19 pandemic and related government actions, that affect the reported amounts of assets and liabilities. Management's estimates and assumptions also affect the 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. Actual results may differ materially from those estimates.
New Accounting Pronouncements	In June 2016, the Financial Accounting Standards Board issued Accounting Standards Update (“ASU”) 2016-13, Financial Instruments–Credit Losses (Topic 326), which modifies the measurement of expected credit losses of certain financial instruments. The Company adopted this ASU on February 1, 2020 with no material impact to the Company's Condensed Consolidated Financial Statements.
Receivables	Receivables are stated at their carrying values, net of a reserve for credit losses, and are primarily due from the following: customers, which also includes insurance companies resulting from pharmacy sales, banks for customer credit, debit cards and electronic transfer transactions that take in excess of seven days to process; suppliers for marketing or incentive programs; governments for income taxes; and real estate transactions.

Net Income Per Common Share (Tables)

6 Months Ended

Jul. 31, 2020

Earnings Per Share [Abstract]

Schedule of calculation of numerator and denominator in earnings per share

The following table provides a reconciliation of the numerators and denominators used to determine basic and diluted net income per common share attributable to Walmart:



	Three Months Ended July 31,					Six Months Ended July 31,
(Amounts in millions, except per share data)	2020		2019			2020			2019
Numerator
Consolidated net income	$	6,439	$	3,680		$	10,513		$	7,586
Consolidated net (income) loss attributable to noncontrolling interest	37		(70		)	(47		)	(134		)
Consolidated net income attributable to Walmart	$	6,476	$	3,610		$	10,466		$	7,452

Denominator
Weighted-average common shares outstanding, basic	2,832		2,853			2,832			2,861
Dilutive impact of share-based awards	16		16			16			17
Weighted-average common shares outstanding, diluted	2,848		2,869			2,848			2,878

Net income per common share attributable to Walmart
Basic	$	2.29	$	1.27		$	3.70		$	2.60
Diluted	2.27		1.26			3.67			2.59

Accumulated Other Comprehensive Loss (Tables)

6 Months Ended

Jul. 31, 2020

Other Comprehensive Income (Loss), Tax [Abstract]

Composition of accumulated other comprehensive loss

The following table provides the changes in the composition of total accumulated other comprehensive loss for the three months ended April 30, 2020 and July 31, 2020, respectively:



(Amounts in millions and net of immaterial income taxes)	Currency Translation and Other			Net Investment Hedges			Cash Flow Hedges			Minimum Pension Liability			Total
Balances as of February 1, 2020	$	(11,827	)	$	1,517		$	(539	)	$	(1,956	)	$	(12,805	)
Other comprehensive income (loss) before reclassifications, net	(3,256		)	157			(295		)	(4		)	(3,398		)
Reclassifications to income, net	—			—			16			19			35
Balances as of April 30, 2020	$	(15,083	)	$	1,674		$	(818	)	$	(1,941	)	$	(16,168	)
Other comprehensive income (loss) before reclassifications, net	246			(191		)	303			(2		)	356
Reclassifications to income, net	—			—			10			18			28
Balances as of July 31, 2020	$	(14,837	)	$	1,483		$	(505	)	$	(1,925	)	$	(15,784	)

The following table provides the changes in the composition of total accumulated other comprehensive loss for the three months ended April 30, 2019 and July 31, 2019, respectively:



(Amounts in millions and net of immaterial income taxes)	Currency Translation and Other			Net Investment Hedges		Cash Flow Hedges			Minimum Pension Liability			Total
Balances as of February 1, 2019	$	(12,085	)	$	1,395	$	(140	)	$	(712	)	$	(11,542	)
Other comprehensive income (loss) before reclassifications, net	496			108		(145		)	(7		)	452
Reclassifications to income, net	(23		)	—		14			8			(1		)
Balances as of April 30, 2019	$	(11,612	)	$	1,503	$	(271	)	$	(711	)	$	(11,091	)
Other comprehensive income (loss) before reclassifications, net	(165		)	140		(172		)	(5		)	(202		)
Reclassifications to income, net	—			—		14			9			23
Balances as of July 31, 2019	$	(11,777	)	$	1,643	$	(429	)	$	(707	)	$	(11,270	)

Short-term Borrowings and Long-term Debt (Tables)

6 Months Ended

Jul. 31, 2020

Debt Disclosure [Abstract]

Schedule of Long-term Debt Instruments [Table Text Block]

The following table provides the changes in the Company's long-term debt for the six months ended July 31, 2020:



(Amounts in millions)	Long-term debt due within one year			Long-term debt			Total
Balances as of February 1, 2020	$	5,362		$	43,714		$	49,076
Repayments of long-term debt	(2,937		)	—			(2,937		)
Reclassifications of long-term debt	3,125			(3,125		)	—
Other	3			370			373
Balances as of July 31, 2020	$	5,553		$	40,959		$	46,512

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

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+ Details

Fair Value Measurements (Tables)

6 Months Ended

Jul. 31, 2020

Fair Value Disclosures [Abstract]

Fair Value Measurements, Recurring and Nonrecurring

The fair value of the Company's equity investments are as follows:



(Amounts in millions)	Fair Value as of July 31, 2020		Fair Value as of January 31, 2020
Equity investments measured using Level 1 inputs	$	4,689	$	2,715
Equity investments measured using Level 2 inputs	5,204		2,723
Total	$	9,893	$	5,438

Notional amounts and fair values of derivatives

As of July 31, 2020 and January 31, 2020, the notional amounts and fair values of these derivatives were as follows:



	July 31, 2020						January 31, 2020
(Amounts in millions)	Notional Amount		Fair Value				Notional Amount		Fair Value
Receive fixed-rate, pay variable-rate interest rate swaps designated as fair value hedges	$	4,000	$	205		⁽¹⁾	$	4,000	$	97		⁽¹⁾
Receive fixed-rate, pay fixed-rate cross-currency swaps designated as net investment hedges	3,500		471			⁽¹⁾	3,750		455			⁽¹⁾
Receive fixed-rate, pay fixed-rate cross-currency swaps designated as cash flow hedges	4,271		(748		)	⁽²⁾	4,067		(696		)	⁽²⁾
Total	$	11,771	$	(72	)		$	11,817	$	(144	)


⁽¹⁾	Classified in Other long-term assets within the Company's Condensed Consolidated Balance Sheets.

⁽²⁾

Classified in Deferred income taxes and other within the Company's Condensed Consolidated Balance Sheets.

Carrying value and fair value of long-term debt

The carrying value and fair value of the Company's long-term debt as of July 31, 2020 and January 31, 2020, are as follows:



	July 31, 2020				January 31, 2020
(Amounts in millions)	Carrying Value		Fair Value		Carrying Value		Fair Value
Long-term debt, including amounts due within one year	$	46,512	$	58,357	$	49,076	$	57,769

- Definition

Tabular disclosure of financial instruments measured at fair value, including those classified in shareholders' equity measured on a recurring or nonrecurring basis. Disclosures include, but are not limited to, fair value measurements recorded and the reasons for the measurements, level within the fair value hierarchy in which the fair value measurements are categorized and transfers between levels 1 and 2. Nonrecurring fair value measurements are those that are required or permitted in the statement of financial position in particular circumstances.

+ References + Details

Segments and Disaggregated Revenue (Tables)

6 Months Ended

Jul. 31, 2020

Disaggregation of Revenue [Line Items]

Segment Net Sales

Net sales by segment are as follows:



	Three Months Ended July 31,				Six Months Ended July 31,
(Amounts in millions)	2020		2019		2020		2019
Net sales:
Walmart U.S.	$	93,282	$	85,200	$	182,025	$	165,544
Walmart International	27,167		29,139		56,933		57,914
Sam's Club	16,375		15,049		31,538		28,879
Net sales	$	136,824	$	129,388	$	270,496	$	252,337

Operating Income by Segment, Interest, Net, and Unrealized (Gains) and Losses

Operating income by segment, as well as operating loss for corporate and support, interest, net and other gains and losses are as follows:



	Three Months Ended July 31,						Six Months Ended July 31,
(Amounts in millions)	2020			2019			2020			2019
Operating income (loss):
Walmart U.S.	$	5,057		$	4,659		$	9,359		$	8,801
Walmart International	812			893			1,618			1,631
Sam's Club	592			480			1,086			931
Corporate and support	(402		)	(449		)	(780		)	(835		)
Operating income	6,059			5,583			11,283			10,528
Interest, net	635			585			1,184			1,210
Other (gains) and losses	(3,222		)	85			(3,943		)	(752		)
Income before income taxes	$	8,646		$	4,913		$	14,042		$	10,070

Walmart U.S.

Disaggregation of Revenue [Line Items]

Disaggregation of Revenue



(Amounts in millions)	Three Months Ended July 31,				Six Months Ended July 31,
Walmart U.S. net sales by merchandise category	2020		2019		2020		2019
Grocery	$	51,545	$	48,196	$	104,466	$	94,395
General merchandise	31,682		27,246		57,148		51,637
Health and wellness	9,154		8,949		18,754		17,888
Other categories	901		809		1,657		1,624
Total	$	93,282	$	85,200	$	182,025	$	165,544

Walmart International

Disaggregation of Revenue [Line Items]

Disaggregation of Revenue



(Amounts in millions)	Three Months Ended July 31,				Six Months Ended July 31,
Walmart International net sales by market	2020		2019		2020		2019
Mexico and Central America	$	7,208	$	8,014	$	15,704	$	15,852
United Kingdom	6,698		7,316		13,830		14,393
Canada	5,127		4,635		9,413		8,758
China	2,579		2,428		5,947		5,491
Other	5,555		6,746		12,039		13,420
Total	$	27,167	$	29,139	$	56,933	$	57,914

Sam's Club

Disaggregation of Revenue [Line Items]

Disaggregation of Revenue



(Amounts in millions)	Three Months Ended July 31,				Six Months Ended July 31,
Sam’s Club net sales by merchandise category	2020		2019		2020		2019
Grocery and consumables	$	10,715	$	8,931	$	21,076	$	17,251
Fuel, tobacco and other categories	2,068		2,863		4,081		5,481
Home and apparel	1,953		1,763		3,233		3,193
Health and wellness	931		842		1,832		1,669
Technology, office and entertainment	708		650		1,316		1,285
Total	$	16,375	$	15,049	$	31,538	$	28,879

Net Income Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended				6 Months Ended
	Jul. 31, 2020	Apr. 30, 2020	Jul. 31, 2019	Apr. 30, 2019	Jul. 31, 2020	Jul. 31, 2019
Numerator
Consolidated net income	$ 6,439	$ 4,074	$ 3,680	$ 3,906	$ 10,513	$ 7,586
Consolidated net (income) loss attributable to noncontrolling interest	37		(70)		(47)	(134)
Consolidated net income attributable to Walmart	$ 6,476		$ 3,610		$ 10,466	$ 7,452
Denominator
Weighted-average common shares outstanding, basic (in shares)	2,832		2,853		2,832	2,861
Dilutive impact of share-based awards (in shares)	16		16		16	17
Weighted-average common shares outstanding, diluted (in shares)	2,848		2,869		2,848	2,878
Net income per common share attributable to Walmart
Basic (in dollars per share)	$ 2.29		$ 1.27		$ 3.70	$ 2.60
Diluted (in dollars per share)	$ 2.27		$ 1.26		$ 3.67	$ 2.59

Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Jul. 31, 2020	Apr. 30, 2020	Jul. 31, 2019	Apr. 30, 2019
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	$ 74,110	$ 81,552	$ 74,910	$ 79,634
Other comprehensive income (loss) before reclassifications	356	(3,398)	(202)	452
Amounts reclassified from accumulated other comprehensive income (loss)	(28)	35	(23)	(1)
Ending balance	81,197	74,110	77,131	74,910
Currency Translation and Other
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(15,083)	(11,827)	(11,612)	(12,085)
Other comprehensive income (loss) before reclassifications	246	(3,256)	(165)	496
Amounts reclassified from accumulated other comprehensive income (loss)	0	0	0	(23)
Ending balance	(14,837)	(15,083)	(11,777)	(11,612)
Net Investment Hedges
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	1,674	1,517	1,503	1,395
Other comprehensive income (loss) before reclassifications	(191)	157	140	108
Amounts reclassified from accumulated other comprehensive income (loss)	0	0	0	0
Ending balance	1,483	1,674	1,643	1,503
Cash Flow Hedges
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(818)	(539)	(271)	(140)
Other comprehensive income (loss) before reclassifications	303	(295)	(172)	(145)
Amounts reclassified from accumulated other comprehensive income (loss)	(10)	16	(14)	14
Ending balance	(505)	(818)	(429)	(271)
Minimum Pension Liability
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(1,941)	(1,956)	(711)	(712)
Other comprehensive income (loss) before reclassifications	(2)	(4)	(5)	(7)
Amounts reclassified from accumulated other comprehensive income (loss)	(18)	19	(9)	8
Ending balance	(1,925)	(1,941)	(707)	(711)
Accumulated other comprehensive loss
Accumulated Other Comprehensive Income Loss [Line Items]
Beginning balance	(16,168)	(12,805)	(11,091)	(11,542)
Ending balance	$ (15,784)	$ (16,168)	$ (11,270)	$ (11,091)

Short-term Borrowings and Long-term Debt (Details) - Domestic Line of Credit - USD ($)	1 Months Ended
	Apr. 30, 2020	Jul. 31, 2020	Jan. 31, 2020
Debt Instrument [Line Items]
Committed line of credit		$ 15,000,000,000.0	$ 15,000,000,000
Revolving Credit Facility
Debt Instrument [Line Items]
Debt instrument, term	364 days
Debt outstanding		$ 10,000,000,000.0

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References + Details

Short-term Borrowings and Long-term Debt (Schedule of Long-term Debt Instruments) (Details) - USD ($) $ in Millions	6 Months Ended
	Jul. 31, 2020	Jul. 31, 2019
Long-term debt due within one year
Balances as of February 1, 2020	$ 5,362
Repayments of long-term debt	(2,937)
Reclassifications of long-term debt	3,125
Other	3
Balances as of July 31, 2020	5,553	$ 4,396
Long-term debt
Balances as of February 1, 2020	43,714
Repayments of long-term debt	0
Reclassifications of long-term debt	(3,125)
Other	370
Balances as of July 31, 2020	40,959	44,404
Total
Balances as of February 1, 2020	49,076
Proceeds from issuance of long-term debt	0	$ 4,020
Repayments of long-term debt	(2,937)
Reclassifications of long-term debt	0
Other	373
Balances as of July 31, 2020	$ 46,512

Fair Value Measurement (Equity Investments) (Details) - USD ($) $ in Millions	Jul. 31, 2020	Jan. 31, 2020
Investment in JD [Line Items]
Equity investments	$ 9,893	$ 5,438
Inputs, Level 1
Investment in JD [Line Items]
Equity investments	4,689	2,715
Inputs, Level 2
Investment in JD [Line Items]
Equity investments	$ 5,204	$ 2,723

Fair Value Measurements (Notional Amounts And Fair Values Of Interest Rate Swaps) (Details) - USD ($) $ in Millions	Jul. 31, 2020	Jan. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional Amount	$ 11,771	$ 11,817
Fair value hedging \| Interest Rate Swap
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional Amount	4,000	4,000
Net investment hedging \| Cross-currency swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional Amount	3,500	3,750
Cash flow hedges \| Cross-currency swaps
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional Amount	4,271	4,067
Recurring \| Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	(72)	(144)
Recurring \| Fair value hedging \| Interest Rate Swap \| Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	205	97
Recurring \| Net investment hedging \| Cross-currency swaps \| Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	471	455
Recurring \| Cash flow hedges \| Cross-currency swaps \| Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value	$ (748)	$ (696)

Fair Value Measurements (Carrying Value And Fair Value Of Long-Term Debt) (Details) - USD ($) $ in Millions	Jul. 31, 2020	Jan. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt	$ 46,512	$ 49,076
Fair Value, Inputs, Level
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	$ 58,357	$ 57,769

Contingencies (Details)	Jul. 31, 2020
Asda Equal Value Lawsuit
Loss Contingencies [Line Items]
Number of pending claims	40,000

Segments and Disaggregated Revenue (Narrative) (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2020 USD ($)	Jul. 31, 2019 USD ($)	Jul. 31, 2020 USD ($) segment	Jul. 31, 2019 USD ($)
Revenue from External Customer [Line Items]
Number of reportable segments \| segment			3
Net sales	$ 136,824	$ 129,388	$ 270,496	$ 252,337
Walmart U.S.
Revenue from External Customer [Line Items]
Net sales	93,282	85,200	182,025	165,544
Walmart International
Revenue from External Customer [Line Items]
Net sales	27,167	29,139	56,933	57,914
Sam's Club
Revenue from External Customer [Line Items]
Net sales	16,375	15,049	31,538	28,879
eCommerceMember \| Walmart U.S.
Revenue from External Customer [Line Items]
Net sales	10,500	5,400	18,800	10,100
eCommerceMember \| Walmart International
Revenue from External Customer [Line Items]
Net sales	3,300	2,600	6,200	5,100
eCommerceMember \| Sam's Club
Revenue from External Customer [Line Items]
Net sales	$ 1,300	$ 1,000	$ 2,300	$ 1,700

Segments and Disaggregated Revenue - Net Sales (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Segment Reporting Information [Line Items]
Net sales	$ 136,824	$ 129,388	$ 270,496	$ 252,337
Walmart U.S.
Segment Reporting Information [Line Items]
Net sales	93,282	85,200	182,025	165,544
Walmart International
Segment Reporting Information [Line Items]
Net sales	27,167	29,139	56,933	57,914
Sam's Club
Segment Reporting Information [Line Items]
Net sales	$ 16,375	$ 15,049	$ 31,538	$ 28,879

Segments and Disaggregated Revenue (Operating Income by Segment, Interest, Net, and Unrealized (Gains) and Losses) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Segment Reporting Information [Line Items]
Operating income	$ 6,059	$ 5,583	$ 11,283	$ 10,528
Interest, net	635	585	1,184	1,210
Other (gains) and losses	(3,222)	85	(3,943)	(752)
Income before income taxes	8,646	4,913	14,042	10,070
Walmart U.S.
Segment Reporting Information [Line Items]
Operating income	5,057	4,659	9,359	8,801
Walmart International
Segment Reporting Information [Line Items]
Operating income	812	893	1,618	1,631
Sam's Club
Segment Reporting Information [Line Items]
Operating income	592	480	1,086	931
Corporate and support
Segment Reporting Information [Line Items]
Operating income	$ (402)	$ (449)	$ (780)	$ (835)

Segments and Disaggregated Revenue (Revenue, Walmart US) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Revenue from External Customer [Line Items]
Net sales	$ 136,824	$ 129,388	$ 270,496	$ 252,337
Walmart U.S.
Revenue from External Customer [Line Items]
Net sales	93,282	85,200	182,025	165,544
Walmart U.S. \| Grocery
Revenue from External Customer [Line Items]
Net sales	51,545	48,196	104,466	94,395
Walmart U.S. \| General merchandise
Revenue from External Customer [Line Items]
Net sales	31,682	27,246	57,148	51,637
Walmart U.S. \| Health and wellness
Revenue from External Customer [Line Items]
Net sales	9,154	8,949	18,754	17,888
Walmart U.S. \| Other categories
Revenue from External Customer [Line Items]
Net sales	$ 901	$ 809	$ 1,657	$ 1,624

Segments and Disaggregated Revenue (Revenue, International) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Revenue from External Customer [Line Items]
Net sales	$ 136,824	$ 129,388	$ 270,496	$ 252,337
Walmart International
Revenue from External Customer [Line Items]
Net sales	27,167	29,139	56,933	57,914
Mexico and Central America \| Walmart International
Revenue from External Customer [Line Items]
Net sales	7,208	8,014	15,704	15,852
United Kingdom \| Walmart International
Revenue from External Customer [Line Items]
Net sales	6,698	7,316	13,830	14,393
Canada \| Walmart International
Revenue from External Customer [Line Items]
Net sales	5,127	4,635	9,413	8,758
China \| Walmart International
Revenue from External Customer [Line Items]
Net sales	2,579	2,428	5,947	5,491
Other \| Walmart International
Revenue from External Customer [Line Items]
Net sales	$ 5,555	$ 6,746	$ 12,039	$ 13,420

Segments and Disaggregated Revenue (Revenue, Sam's Club) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 31, 2020	Jul. 31, 2019	Jul. 31, 2020	Jul. 31, 2019
Revenue from External Customer [Line Items]
Net sales	$ 136,824	$ 129,388	$ 270,496	$ 252,337
Sam's Club
Revenue from External Customer [Line Items]
Net sales	16,375	15,049	31,538	28,879
Sam's Club \| Grocery and consumables
Revenue from External Customer [Line Items]
Net sales	10,715	8,931	21,076	17,251
Sam's Club \| Fuel, tobacco and other categories
Revenue from External Customer [Line Items]
Net sales	2,068	2,863	4,081	5,481
Sam's Club \| Home and apparel
Revenue from External Customer [Line Items]
Net sales	1,953	1,763	3,233	3,193
Sam's Club \| Health and wellness
Revenue from External Customer [Line Items]
Net sales	931	842	1,832	1,669
Sam's Club \| Technology, office and entertainment
Revenue from External Customer [Line Items]
Net sales	$ 708	$ 650	$ 1,316	$ 1,285