Cover	12 Months Ended
Cover	Jan. 03, 2025
Cover [Abstract]
Document Type	DEF 14A
Entity Registrant Name	KBR, INC.
Entity Central Index Key	0001357615
Amendment Flag	false

Pay vs Performance Disclosure - USD ($)

12 Months Ended

24 Months Ended

36 Months Ended

48 Months Ended

60 Months Ended

Jan. 03, 2025

Dec. 29, 2023

Dec. 31, 2022

Dec. 31, 2021

Dec. 31, 2020

Dec. 31, 2021

Dec. 31, 2022

Dec. 29, 2023

Jan. 03, 2025

Pay vs Performance Disclosure [Table]

Pay vs Performance Disclosure, Table

Pay Versus Performance Table

As required by Section 953(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act and Item 402(v) of Regulation S-K, we are providing the following information about the relationship between executive compensation and certain financial performance measures of the Company. For more information, refer to the “Compensation Discussion and Analysis” section of this proxy statement.


			Average Summary	Average	Value of initial fixed $100 investment based on:
Year (a)	Summary Compensation Table Total for CEO⁽¹⁾ ($)(b)	Compensation Actually Paid to CEO⁽²⁾ ($)(c)	Compensation Table Total for non-CEO NEOs⁽³⁾ ($)(d)	Compensation Actually Paid to non-CEO NEOs⁽⁴⁾ ($)(e)	Company TSR⁽⁵⁾ ($)(f)	Peer Group Total Shareholder Return⁽⁶⁾ ($)(g)	Net Income (Loss)⁽⁷⁾ ($)(h)	Company-Selected Performance Measure: Adj. EPS⁽⁸⁾ ($)(i)
2024	12,556,945	13,432,658	3,147,439	3,317,203	204.78	201.70	381,000,000	3.34
2023	12,659,920	15,968,454	3,017,505	3,602,870	190.41	175.48	(261,000,000)	2.91
2022	12,617,035	16,957,757	2,943,662	3,716,852	179.76	143.37	192,000,000	2.71
2021	12,024,347	22,501,119	2,595,828	3,781,778	160.59	131.72	35,000,000	2.43
2020	9,864,381	9,222,322	2,218,991	2,138,848	103.16	103.03	(42,000,000)	1.74

Company Selected Measure Name

Adjusted EPS

Named Executive Officers, Footnote

⁽¹⁾

The amounts in this column are the amounts of total compensation reported for Mr. Bradie for each corresponding year in the “Total” column of the Summary Compensation Table on page 81.

Peer Group Issuers, Footnote [Text Block]

⁽⁶⁾

The peer group used for this purpose is the Peer Group used by the Company for benchmarking purposes as discussed in the “Compensation Discussion and Analysis” section of this proxy statement. Peer group TSR was calculated on a market capitalization weighted basis according to the respective issuers’ stock market capitalization at the beginning of each period for which a return is indicated. TSR for both the Company and the peer group is based on an initial $100 investment, measured on a cumulative basis from the market close on December 31, 2019, through and including January 3, 2025. TSR calculations reflect reinvestment of dividends.

The 2024 Peer Group is composed of the following companies: BAE Systems plc, Booz Allen Hamilton Holding Corporation, CACI International Inc., Conduent Incorporated, Dover Corporation, Flowserve Corporation, Fluor Corporation, Gartner, Inc., Hubbell Incorporated, Huntington Ingalls Industries, Inc., Jacobs Solutions Inc., L3Harris Technologies, Inc., Leidos Holdings, Inc., Parsons Corporation, Science Applications International Corporation, Teradata Corporation, Tetra Tech, Inc., Textron Inc., and The Timken Company. ManTech International Corporation, which was a constituent of our 2023 Peer Group, was taken private and ceased being publicly traded in September 2022, and it therefore was excluded in determining our peer group TSR for 2023 (and the prior years presented). As a result, the 2024 Peer Group and 2023 Peer Group were the same for the purpose of determining our peer group TSR.

PEO Total Compensation Amount

$ 12,556,945

$ 12,659,920

$ 12,617,035

$ 12,024,347

$ 9,864,381

PEO Actually Paid Compensation Amount

$ 13,432,658

15,968,454

16,957,757

22,501,119

9,222,322

Adjustment To PEO Compensation, Footnote

⁽²⁾

The amounts in this column represent the amount of “Compensation Actually Paid” to Mr. Bradie, as computed in accordance with Item 402(v) of Regulation S-K. The amounts do not reflect the actual amount of compensation earned by or paid to Mr. Bradie during the applicable year. In accordance with the requirements of Item 402(v) of Regulation S-K, the following adjustments were made to Mr. Bradie’s total compensation for each year to determine the “Compensation Actually Paid”:


Year	Reported Summary Compensation table total for CEO ($)	Reported value of equity awards^(a) ($)	Equity award adjustments^(b) ($)	Reported change in the actuarial present value of pension benefits^(c) ($)	Pension benefit adjustments ($)	Compensation Actually Paid to CEO ($)
2024	12,556,945	(4,819,548)	5,695,261	—	—	13,432,658
2023	12,659,920	(4,630,378)	7,938,912	—	—	15,968,454
2022	12,617,035	(4,641,028)	8,981,750	—	—	16,957,757
2021	12,024,347	(4,256,264)	14,733,036	—	—	22,501,119
2020	9,864,381	(3,614,585)	2,972,526	—	—	9,222,322

^(a)

This column reflects the grant date fair value of equity awards, which are the amounts reported in the “Stock Awards” column in the Summary Compensation Table for the applicable year.

^(b)

The equity award adjustments for each applicable year include the addition (or subtraction, as applicable) of the following: (i) the year-end fair value of any equity awards granted in the applicable year that are outstanding and unvested as of the end of the year; (ii) the amount of change as of the end of the applicable fiscal year (from the end of the prior fiscal year) in fair value of any awards granted in prior years that are outstanding and unvested as of the end of the applicable year; (iii) for awards that are granted and vest in same applicable year, the fair value as of the vesting date; (iv) for awards granted in prior years that vest in the applicable year, the amount equal to the change as of the vesting date (from the end of the prior fiscal year) in fair value; (v) for awards granted in prior years that are determined to fail to meet the applicable vesting conditions during the applicable year, a deduction for the amount equal to the fair value at the end of the prior fiscal year; and (vi) the dollar value of any dividends or other earnings paid on stock or option awards in the applicable year prior to the vesting date that are not otherwise reflected in the fair value of such award or included in any other component of total compensation for the applicable year. The valuation assumptions used to calculate fair values did not materially differ from those disclosed at the time of grant. The amounts deducted or added in calculating the equity award adjustments are as follows:


Year	Year-end fair value of equity awards granted in year ($)	Year over year change in fair value of outstanding and unvested equity awards ($)	Fair value as of vesting date of equity awards granted and vested in the year ($)	Year over year change in fair value of equity awards granted in prior years that vested in the year ($)	Fair value at the end of the prior year of equity awards that failed to meet vesting conditions in the year ($)	Value of dividends or other earnings paid on stock or option awards not otherwise reflected in fair value or total compensation ($)	Total equity award adjustments ($)
2024	5,592,210	(143,980)	—	221,880	—	25,151	5,695,261
2023	5,608,767	2,118,155	—	163,948	—	48,042	7,938,912
2022	5,553,263	3,224,991	—	131,229	—	72,267	8,981,750
2021	8,574,868	6,082,602	—	7,120	—	68,446	14,733,036
2020	4,852,517	(1,404,632)	—	(551,461)	—	76,102	2,972,526

^(c)

Mr. Bradie does not participate in any KBR-sponsored defined benefit or actuarial pension plans.

Non-PEO NEO Average Total Compensation Amount

$ 3,147,439

3,017,505

2,943,662

2,595,828

2,218,991

Non-PEO NEO Average Compensation Actually Paid Amount

$ 3,317,203

3,602,870

3,716,852

3,781,778

2,138,848

Adjustment to Non-PEO NEO Compensation Footnote [Text Block]

⁽³⁾

The amounts in this column represent the average of the amounts reported for the Company’s NEOs as a group (excluding Mr. Bradie) in the “Total” column of the Summary Compensation Table in each applicable year. The names of each of the NEOs (excluding Mr. Bradie) included for purposes of calculating the average amounts in each applicable year are as follows: (i) for 2024, Messrs. Bright, Ibrahim, and Sopp and Ms. Galindo; (ii) for 2022 and 2023, Messrs. Bright, Ibrahim, and Sopp and Ms. Myles; (iii) for 2021, Messrs. Bright, Ibrahim, Kelly, and Sopp and Ms. Akerson; and (iv) for 2020, Messrs. Bright, Ibrahim, and Sopp and Ms. Akerson.

⁽⁴⁾

The amounts in this column represent the average amount of “Compensation Actually Paid” to the NEOs as a group (excluding Mr. Bradie), as computed in accordance with Item 402(v) of Regulation S-K. The amounts do not reflect the actual average amount of compensation earned by or paid to the NEOs as a group (excluding Mr. Bradie) during the applicable year. In accordance with the requirements of Item 402(v) of Regulation S-K, the following adjustments were made to average total compensation for the NEOs as a group (excluding Mr. Bradie) for each year to determine the “Compensation Actually Paid,” using the same methodology described above in Note 2:


Year	Average reported Summary Compensation Table total for non-CEO named executive officers ($)	Average reported value of equity awards^(a) ($)	Average equity award adjustments^(b) ($)	Average reported change in the actuarial present value of pension benefits^(c) ($)	Average pension benefit adjustments ($)	Average Compensation Actually Paid to non-CEO named executive officers ($)
2024	3,147,439	(850,524)	1,020,288	—	—	3,317,203
2023	3,017,505	(750,463)	1,335,828	—	—	3,602,870
2022	2,943,662	(762,467)	1,535,657	—	—	3,716,852
2021	2,595,828	(721,882)	1,907,832	—	—	3,781,778
2020	2,218,991	(628,951)	548,808	—	—	2,138,848

^(a)	This column reflects the average grant date fair value of equity awards, which are the amounts reported in the “Stock Awards” column in the Summary Compensation Table for the applicable year, for the NEOs as a group (excluding Mr. Bradie).
^(b)	The amounts deducted or added in calculating the total average equity award adjustments are as follows:


Year	Average year-end fair value of equity awards granted in year ($)	Year over year average change in fair value of outstanding and unvested equity awards ($)	Average fair value as of vesting date of equity awards granted and vested in the year ($)	Year over year average change in fair value of equity awards granted in prior years that vested in the year ($)	Average fair value at the end of the prior year of equity awards that failed to meet vesting conditions in the year ($)	Average value of dividends or other earnings paid on stock or option awards not otherwise reflected in fair value or total compensation ($)	Total average equity award adjustments ($)
2024	986,895	(25,383)	—	49,196	—	9,580	1,020,288
2023	909,059	362,354	—	56,203	—	8,212	1,335,828
2022	912,352	605,404	—	7,066	—	10,835	1,535,657
2021	1,239,559	802,342	—	2,557	(147,871)	11,245	1,907,832
2020	844,368	(213,742)	—	(93,908)	—	12,090	548,808

^(c)

Our NEOs do not participate in any KBR-sponsored defined benefit or actuarial pension plans.

Compensation Actually Paid vs. Total Shareholder Return [Text Block]

Compensation actually paid versus total shareholder return

Compensation Actually Paid vs. Net Income [Text Block]

Compensation actually paid versus net income (loss)

Compensation Actually Paid vs. Company Selected Measure [Text Block]

Compensation actually paid versus adjusted EPS

Tabular List [Table Text Block]

Important Financial Performance Measures

For 2024, the most important financial performance measures (including the Company-Selected Measure) that we used to link executive compensation actually paid to the NEOs to our performance, which are the performance metrics the Committee chose for our short-term and long-term incentive plans and are described in more detail in the “ Compensation Discussion and Analysis” section of this proxy statement, are as follows, listed on an unranked basis:

	●	Adjusted EPS
	●	Adjusted OCF
	●	Relative TSR
	●	Book-to-bill
	●	Sustainability

Adjusted EPS and adjusted OCF are non-GAAP financial measures. See the section titled “Non-GAAP Financial Information” at the end of this proxy statement for further information, including reconciliations of adjusted EPS and adjusted OCF to the most directly comparable GAAP measures.

Total Shareholder Return Amount

103.16

$ 160.59

$ 179.76

$ 190.41

$ 204.78

Peer Group Total Shareholder Return Amount

103.03

$ 131.72

$ 143.37

$ 175.48

$ 201.70

Net Income (Loss) Attributable to Parent

$ 381,000,000

$ (261,000,000)

$ 192,000,000

$ 35,000,000

$ (42,000,000)

Company Selected Measure Amount

3.34

2.91

2.71

2.43

1.74

PEO Name

Mr. Bradie

Measure [Axis]: 1

Pay vs Performance Disclosure [Table]

Measure Name

Adjusted EPS

Non-GAAP Measure Description [Text Block]

⁽⁸⁾

Adjusted EPS or adjusted earnings per share is a non-GAAP financial measure. See the section titled “Non-GAAP Financial Information” at the end of this proxy statement for further information, including reconciliation of adjusted EPS to the most directly comparable GAAP measure.

Measure [Axis]: 2

Pay vs Performance Disclosure [Table]

Measure Name

Adjusted OCF

Measure [Axis]: 3

Pay vs Performance Disclosure [Table]

Measure Name

Relative TSR

Measure [Axis]: 4

Pay vs Performance Disclosure [Table]

Measure Name

Book-to-bill

Measure [Axis]: 5

Pay vs Performance Disclosure [Table]

Measure Name

Sustainability

Award Timing Disclosure	12 Months Ended
Award Timing Disclosure	Jan. 03, 2025
Awards Close in Time to MNPI Disclosures [Table]
Award Timing MNPI Disclosure	Equity awards are discretionary and are generally granted to our NEOs two business days after KBR files a Form 10-K with the SEC in the first quarter of the grant year. In certain circumstances, including the hiring or promotion of an officer, our Compensation Committee may approve grants to be effective at other times. KBR did not grant stock options to its employees during the last completed fiscal year; however, stock option grants, when approved by our Compensation Committee, are never issued with an exercise price below the fair market value of our common stock on the date of grant. KBR does not time the disclosure of material nonpublic information for the purpose of affecting the value of executive compensation.
Award Timing Method	Equity awards are discretionary and are generally granted to our NEOs two business days after KBR files a Form 10-K with the SEC in the first quarter of the grant year. In certain circumstances, including the hiring or promotion of an officer, our Compensation Committee may approve grants to be effective at other times.
Award Timing Predetermined	true
MNPI Disclosure Timed for Compensation Value	false

Insider Trading Policies and Procedures	12 Months Ended
Insider Trading Policies and Procedures	Jan. 03, 2025
Insider Trading Policies and Procedures [Line Items]
Insider Trading Policies and Procedures Adopted	true