Equity, Income Tax Effects on Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Before-Tax Amount
Other comprehensive income (loss) before income tax expense	$ 553	$ (284)	$ 329
Tax Expense (Benefit)
Income tax expense related to items of other comprehensive income (loss)	18	70	82
Net Amount
Other comprehensive income (loss)	535	(354)	247
Foreign Currency Translation Adjustment [Member]
Before-Tax Amount
Other comprehensive income (loss), before reclassifications, before tax	433	(613)	(47)
Tax Expense (Benefit)
Other comprehensive income (loss), before reclassifications, tax expense (benefit)	0	(7)	0
Net Amount
Other comprehensive income (loss), before reclassifications, net of tax	433	(606)	(47)
Net Gain (Loss) on Pension and Other Postretirement Benefits [Member]
Before-Tax Amount
Effect of exchange rates, before tax	4		2
Other comprehensive income (loss) before income tax expense	30	335	378
Tax Expense (Benefit)
Effect of exchange rates, tax expense	1		0
Income tax expense related to items of other comprehensive income (loss)	9	77	82
Net Amount
Effect of exchange rates, net amount	3		2
Other comprehensive income (loss)	21	258	296
Net Actuarial Gain (Loss) [Member]
Before-Tax Amount
Other comprehensive income (loss), before reclassifications, before tax	77	244	317
Reclassification from accumulated other comprehensive loss, current period, before tax	(12)	52	80
Tax Expense (Benefit)
Other comprehensive income (loss), before reclassifications, tax expense (benefit)	18	57	69
Reclassification from accumulated other comprehensive loss, current period, tax expense (benefit)	(3)	12	18
Net Amount
Other comprehensive income (loss), before reclassifications, net of tax	59	187	248
Reclassification from accumulated other comprehensive loss, current period, net of tax	(9)	40	62
Prior Service Cost (Credit) [Member]
Before-Tax Amount
Other comprehensive income (loss), before reclassifications, before tax	(19)		(4)
Reclassification from accumulated other comprehensive loss, current period, before tax	(22)	(22)	(25)
Tax Expense (Benefit)
Other comprehensive income (loss), before reclassifications, tax expense (benefit)	(4)		(1)
Reclassification from accumulated other comprehensive loss, current period, tax expense (benefit)	(5)	(5)	(6)
Net Amount
Other comprehensive income (loss), before reclassifications, net of tax	(15)		(3)
Reclassification from accumulated other comprehensive loss, current period, net of tax	(17)	(17)	(19)
Miscellaneous Loss [Member]
Before-Tax Amount
Other comprehensive income (loss), before reclassifications, before tax	0
Tax Expense (Benefit)
Other comprehensive income (loss), before reclassifications, tax expense (benefit)	2
Net Amount
Other comprehensive income (loss), before reclassifications, net of tax	(2)
Settlement Loss [Member]
Before-Tax Amount
Reclassification from accumulated other comprehensive loss, current period, before tax	2	61	8
Tax Expense (Benefit)
Reclassification from accumulated other comprehensive loss, current period, tax expense (benefit)	0	13	2
Net Amount
Reclassification from accumulated other comprehensive loss, current period, net of tax	2	48	6
Net Gain (Loss) from Derivative Instruments Designated and Qualifying as Cash Flow Hedges [Member]
Before-Tax Amount
Other comprehensive income (loss), before reclassifications, before tax	82	(292)	(48)
Reclassification from accumulated other comprehensive loss, current period, before tax	8	286	46
Other comprehensive income (loss) before income tax expense	90	(6)	(2)
Tax Expense (Benefit)
Other comprehensive income (loss), before reclassifications, tax expense (benefit)	8	(32)	(5)
Reclassification from accumulated other comprehensive loss, current period, tax expense (benefit)	1	32	5
Income tax expense related to items of other comprehensive income (loss)	9	0	0
Net Amount
Other comprehensive income (loss), before reclassifications, net of tax	74	(260)	(43)
Reclassification from accumulated other comprehensive loss, current period, net of tax	7	254	41
Other comprehensive income (loss)	$ 81	$ (6)	$ (2)