Pension and Other Postretirement Benefits - Components of Net Periodic Benefit Cost (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	[1]	$ 10	$ 13	$ 22
Interest cost	[1],[2]	114	104	116
Expected return on plan assets	[1],[2]	(146)	(151)	(281)
Recognized net actuarial loss	[1],[2]	28	88	190
Settlements	[1],[3]	21	632	968
Net periodic benefit cost	[1],[4]	27	686	1,015
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost		3	4	4
Interest cost	[2]	26	15	15
Recognized net actuarial loss	[2]	5	18	21
Amortization of prior service cost (benefit)	[2]	(14)	(14)	(14)
Settlements	[3]			26
Curtailment charge (gain)	[5]			(17)
Net periodic benefit cost	[4]	$ 20	$ 23	$ 35

[1] In 2023, 2022, and 2021, net periodic benefit cost for U.S pension plans was $6, $698, and $962, respectively.

[2] These amounts were reported in Other expenses (income), net on the accompanying Statement of Consolidated Operations.

[3] These amounts were reported in Restructuring and other charges, net on the accompanying Statement of Consolidated Operations (see Note D). In 2023, 2022 and 2021, settlements were due to management actions (see Plan Actions above).

[4] Amounts attributed to joint venture partners are not included.

[5] These amounts were reported in Restructuring and other charges, net on the accompanying Statement of Consolidated Operations (see Note D). In 2021, curtailments were due to management actions (see Plan Actions above).