Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Increase (Decrease) Accumulated Other Comprehensive Loss, Net of Tax
Other comprehensive income	$ 137	$ 156
Net Effect of Exchange Rate Fluctuations
Increase (Decrease) Accumulated Other Comprehensive Loss, Net of Tax
Balance at beginning of the period	(1,280)	(1,290)
Change before reclassifications	158	130
Other comprehensive income	158	130
Balance at end of the period	(1,122)	(1,160)
Change in Certain Derivative Instruments
Increase (Decrease) Accumulated Other Comprehensive Loss, Net of Tax
Balance at beginning of the period	4	(21)
Change before reclassifications	(19)	18
Amounts reclassified from accumulated other comprehensive loss	(2)	(15)
Other comprehensive income	(21)	3
Balance at end of the period	(17)	(18)
Employee Benefit Plans
Increase (Decrease) Accumulated Other Comprehensive Loss, Net of Tax
Balance at beginning of the period	(585)	(661)
Change before reclassifications	(1)	(2)
Amounts reclassified from accumulated other comprehensive loss	4	14
Translation effect	(6)	6
Other comprehensive income	(3)	18
Balance at end of the period	(588)	(643)
Accumulated Other Comprehensive Loss.
Increase (Decrease) Accumulated Other Comprehensive Loss, Net of Tax
Balance at beginning of the period	(1,861)	(1,972)
Change before reclassifications	138	146
Amounts reclassified from accumulated other comprehensive loss	2	(1)
Translation effect	(6)	6
Other comprehensive income	134	151
Balance at end of the period	$ (1,727)	$ (1,821)