Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ 5,353	$ 4,554
Other comprehensive income (loss):
Total Other comprehensive (loss) income, net of tax	(18)	48
Balance at end of period	$ 5,522	4,792
4.850% Notes, due 2031 | Notes Payable
Accumulated Other Comprehensive Income (Loss) [Line Items]
Long-term debt, interest rate (as a percent)	4.85%
Accumulated other comprehensive loss
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	$ (1,673)	(1,878)
Other comprehensive income (loss):
Total Other comprehensive (loss) income, net of tax	(18)	48
Balance at end of period	(1,691)	(1,830)
Pension and other postretirement benefits
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(592)	(672)
Other comprehensive income (loss):
Other comprehensive income (loss) before reclassifications, before tax	0	(1)
Tax benefit (expense)	0	1
Total Other comprehensive income (loss) before reclassifications, net of tax	0	0
Reclassification from other comprehensive income (loss), before tax	5	3
Tax expense	(1)	0
Total amount reclassified from Accumulated other comprehensive income (loss), net of tax	4	3
Total Other comprehensive (loss) income, net of tax	4	3
Balance at end of period	(588)	(669)
Foreign currency translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(1,052)	(1,207)
Other comprehensive income (loss):
Total Other comprehensive (loss) income, net of tax	(32)	45
Balance at end of period	(1,084)	(1,162)
Cash flow hedges
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Balance at beginning of period	(29)	1
Other comprehensive income (loss):
Other comprehensive income (loss) before reclassifications, before tax	13	(1)
Tax benefit (expense)	(3)	0
Total Other comprehensive income (loss) before reclassifications, net of tax	10	(1)
Reclassification from other comprehensive income (loss), before tax	0	2
Tax expense	0	(1)
Total amount reclassified from Accumulated other comprehensive income (loss), net of tax	0	1
Total Other comprehensive (loss) income, net of tax	10	0
Balance at end of period	$ (19)	$ 1