Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Increase (Decrease) Accumulated Other Comprehensive Loss, Net of Tax
Other comprehensive income	$ 20	$ 137
Net Effect of Exchange Rate Fluctuations
Increase (Decrease) Accumulated Other Comprehensive Loss, Net of Tax
Balance at beginning of the period	(949)	(1,280)
Change before reclassifications	5	158
Other comprehensive income	5	158
Balance at end of the period	(944)	(1,122)
Change in Certain Derivative Instruments
Increase (Decrease) Accumulated Other Comprehensive Loss, Net of Tax
Balance at beginning of the period	(43)	4
Change before reclassifications	8	(19)
Amounts reclassified from accumulated other comprehensive income	(1)	(2)
Translation effect	1
Tax effect	1
Other comprehensive income	9	(21)
Balance at end of the period	(34)	(17)
Employee Benefit Plans
Increase (Decrease) Accumulated Other Comprehensive Loss, Net of Tax
Balance at beginning of the period	(588)	(585)
Change before reclassifications	(1)	(1)
Amounts reclassified from accumulated other comprehensive income	6	4
Translation effect	1	(6)
Other comprehensive income	6	(3)
Balance at end of the period	(582)	(588)
Accumulated Other Comprehensive Loss.
Increase (Decrease) Accumulated Other Comprehensive Loss, Net of Tax
Balance at beginning of the period	(1,580)	(1,861)
Change before reclassifications	12	138
Amounts reclassified from accumulated other comprehensive income	5	2
Translation effect	2	(6)
Tax effect	1
Other comprehensive income	20	134
Balance at end of the period	$ (1,560)	$ (1,727)