Equity, Income Tax Effects on Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Before-Tax Amount
Other comprehensive income before income tax expense (benefit)	$ 329	$ 83	$ 107
Tax Expense (Benefit)
Income tax expense (benefit) related to items of other comprehensive income	82	(16)	(48)
Net Amount
Other comprehensive income	247	99	155
Foreign Currency Translation Adjustment [Member]
Before-Tax Amount
Other comprehensive income (loss), before reclassifications, before tax	(47)	161	349
Tax Expense (Benefit)
Other comprehensive income, before reclassifications, tax expense (benefit)	0	0	0
Net Amount
Other comprehensive income, before reclassifications, net of tax	(47)	161	349
Net Gain (Loss) on Pension and Other Postretirement Benefits [Member]
Before-Tax Amount
Effect of exchange rates, before tax	2
Other comprehensive income before income tax expense (benefit)	378	(80)	(234)
Tax Expense (Benefit)
Effect of exchange rates, tax expense (benefit)	0
Income tax expense (benefit) related to items of other comprehensive income	82	(15)	(47)
Net Amount
Effect of exchange rates, net of tax	2
Other comprehensive income	296	(65)	(187)
Net Actuarial Gain (Loss) [Member]
Before-Tax Amount
Other comprehensive income (loss), before reclassifications, before tax	317	(128)	(245)
Reclassification from accumulated other comprehensive loss, current period, before tax	80	74	38
Tax Expense (Benefit)
Other comprehensive income, before reclassifications, tax expense (benefit)	69	(26)	(54)
Reclassification from accumulated other comprehensive loss, current period, tax expense (benefit)	18	17	9
Net Amount
Other comprehensive income, before reclassifications, net of tax	248	(102)	(191)
Reclassification from accumulated other comprehensive loss, current period, net of tax	62	57	29
Prior Service Cost (Credit) [Member]
Before-Tax Amount
Other comprehensive income (loss), before reclassifications, before tax	(4)	(5)	(3)
Reclassification from accumulated other comprehensive loss, current period, before tax	(25)	(26)	(28)
Tax Expense (Benefit)
Other comprehensive income, before reclassifications, tax expense (benefit)	(1)	(1)	(1)
Reclassification from accumulated other comprehensive loss, current period, tax expense (benefit)	(6)	(6)	(6)
Net Amount
Other comprehensive income, before reclassifications, net of tax	(3)	(4)	(2)
Reclassification from accumulated other comprehensive loss, current period, net of tax	(19)	(20)	(22)
Miscellaneous Loss [Member]
Before-Tax Amount
Other comprehensive income (loss), before reclassifications, before tax			0
Tax Expense (Benefit)
Other comprehensive income, before reclassifications, tax expense (benefit)			4
Net Amount
Other comprehensive income, before reclassifications, net of tax			(4)
Curtailment and Settlement Loss [Member]
Before-Tax Amount
Reclassification from accumulated other comprehensive loss, current period, before tax	8	5	4
Tax Expense (Benefit)
Reclassification from accumulated other comprehensive loss, current period, tax expense (benefit)	2	1	1
Net Amount
Reclassification from accumulated other comprehensive loss, current period, net of tax	6	4	3
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	(48)	36	(6)
Reclassification from accumulated other comprehensive loss, current period, before tax	46	(34)	(2)
Other comprehensive income before income tax expense (benefit)	(2)	2	(8)
Tax Expense (Benefit)
Other comprehensive income, before reclassifications, tax expense (benefit)	(5)	3	(1)
Reclassification from accumulated other comprehensive loss, current period, tax expense (benefit)	5	(4)	0
Income tax expense (benefit) related to items of other comprehensive income	0	(1)	(1)
Net Amount
Other comprehensive income, before reclassifications, net of tax	(43)	33	(5)
Reclassification from accumulated other comprehensive loss, current period, net of tax	41	(30)	(2)
Other comprehensive income	$ (2)	$ 3	$ (7)