Pension and Other Postretirement Benefits - Additional Information (Detail)		3 Months Ended							12 Months Ended
		Dec. 31, 2024 USD ($) Employees	Jun. 30, 2024 USD ($)	Mar. 31, 2024 USD ($)	Sep. 30, 2023 USD ($)	Jun. 30, 2023 USD ($) Retiree	Dec. 31, 2022 USD ($) Employees	Sep. 30, 2022 USD ($) Retiree	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($) Employees	Dec. 31, 2023 USD ($) Employees	Dec. 31, 2022 USD ($) Employees	Aug. 11, 2022 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Number of employees covered under defined benefit plans | Employees							4,400				530	4,400
Increase (decrease) in other noncurrent assets										$ 4,000,000	$ 210,000,000	$ 87,000,000
Fair value of plan assets		$ 1,993,000,000								$ 1,993,000,000	$ 2,206,000,000
Health care cost trend rate assumed for next year		7.00%					7.00%			7.00%	6.50%	7.00%
Cash contribution to pension plans										$ 16,000,000	$ 24,000,000	$ 17,000,000
Expenses related to saving and investment plans										86,000,000	80,000,000	71,000,000
Expenses related to member-funded pension plan		$ 16,000,000					$ 17,000,000			$ 16,000,000	16,000,000	17,000,000
Scenario Forecast [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected long term rate of return on plan assets									5.78%
Health care cost trend rate assumed for next year									7.00%
Expected minimum required cash contribution to pension plans, next year									$ 60,000,000
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Weighted average discount rate yield curve										10 years
United States [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan obligations		1,056,000,000								$ 1,056,000,000	1,119,000,000
Fair value of plan assets		988,000,000								988,000,000	1,054,000,000
Funded status		$ (68,000,000)								(68,000,000)	(65,000,000)
United States [Member] | Scenario Forecast [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected minimum required cash contribution to pension plans, next year									$ 40,000,000
Action #1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Increase (decrease) in other noncurrent assets				$ (1,000,000)						(1,000,000)
Curtailment loss				1,000,000						$ 1,000,000
Curtailment loss after tax				$ 0
Number of employees affected the change in defined benefit plans | Employees		110								110
Action #2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Increase (decrease) in other noncurrent assets			$ 19,000,000							$ 19,000,000
Settlement of certain other postretirement benefits			1,000,000							$ (1,000,000)
Non-cash settlement loss after tax			$ 0
Number of employees affected the change in defined benefit plans | Employees		10								10
Action #3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Settlement of certain other postretirement benefits		$ 1,000,000								$ (1,000,000)
Non-cash settlement loss after tax		$ 1
Number of employees affected the change in defined benefit plans | Employees		140								140
Action# 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Increase (decrease) to accrued other pension benefits liability						$ 15,000,000					15,000,000
Decrease to accrued other postretirement benefits						$ (9,000,000)					$ (9,000,000)
Number of employees affected the change in defined benefit plans | Employees											370
Action# 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of retirees | Retiree						530
Plan obligations						$ 235,000,000
Increase (decrease) in other noncurrent assets						(5,000,000)					$ (5,000,000)
Increase (decrease) to accrued other pension benefits liability						22,000,000					22,000,000
Settlement of certain other postretirement benefits						(21,000,000)					$ 21,000,000
Non-cash settlement loss after tax						$ (16,000,000)
Number of employees affected the change in defined benefit plans | Employees											530
Action# 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Increase (decrease) in other noncurrent assets					$ (2,000,000)						$ (2,000,000)
Number of employees affected the change in defined benefit plans | Employees											50
Action# 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of retirees | Retiree								4,400
Plan obligations													$ 1,000,000,000
Increase (decrease) in other noncurrent assets								$ 27,000,000				27,000,000
Increase (decrease) to accrued other pension benefits liability								5,000,000				5,000,000
Settlement of certain other postretirement benefits								(617,000,000)				$ 617,000,000
Number of employees affected the change in defined benefit plans | Employees							4,400					4,400
Action# 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Settlement of certain other postretirement benefits								(11,000,000)				$ 11,000,000
Number of employees affected the change in defined benefit plans | Employees							45					45
Action# 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Increase (decrease) in other noncurrent assets								(12,000,000)				$ (12,000,000)
Increase (decrease) to accrued other pension benefits liability								23,000,000				23,000,000
Settlement of certain other postretirement benefits								(1,000,000)				$ 1,000,000
Number of employees affected the change in defined benefit plans | Employees							5					5
Action# 4 [Member]
Defined Benefit Plan Disclosure [Line Items]
Increase (decrease) in other noncurrent assets								21,000,000				$ 21,000,000
Settlement of certain other postretirement benefits								$ 3,000,000				$ (3,000,000)
Number of employees affected the change in defined benefit plans | Employees							25					25
Action# 5 [Member]
Defined Benefit Plan Disclosure [Line Items]
Increase (decrease) to accrued other pension benefits liability							$ 3,000,000					$ 3,000,000
Settlement of certain other postretirement benefits							$ (6,000,000)					$ 6,000,000
Number of employees affected the change in defined benefit plans | Employees							20					20
Target Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Expenses related to target benefit plan										$ 8,000,000	$ 8,000,000	$ 9,000,000
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of employees covered under defined benefit plans | Employees		16,000								16,000
Plan obligations		$ 2,145,000,000								$ 2,145,000,000	2,393,000,000
Settlement of certain other postretirement benefits	[1],[2]									2,000,000	(21,000,000)	$ (632,000,000)
Curtailment loss	[1],[3]									1,000,000
Funded status		$ (145,000,000)								$ (145,000,000)	$ (174,000,000)
Expected long term rate of return on plan assets										6.13%	6.21%	4.94%
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of employees covered under defined benefit plans | Employees		19,000								19,000
Funded status		$ (462,000,000)								$ (462,000,000)	$ (494,000,000)

[1] In 2024, 2023, and 2022, net periodic benefit cost for U.S pension plans was $7, $6, and $698, respectively.

[2] These amounts were reported in Restructuring and other charges, net on the accompanying Statement of Consolidated Operations (see Note D). In 2024, 2023 and 2022, settlements were due to plan actions (see Actions above).

[3] These amounts were reported in Restructuring and other charges, net on the accompanying Statement of Consolidated Operations (see Note D). In 2024, curtailments were due to plan actions (see Actions above).