Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Increase (Decrease) Accumulated Other Comprehensive Loss, Net of Tax
Other comprehensive income (loss)	$ (241)	$ 143	$ (221)	$ 280
Net Effect of Exchange Rate Fluctuations
Increase (Decrease) Accumulated Other Comprehensive Loss, Net of Tax
Balance at beginning of the period	(944)	(1,122)	(949)	(1,280)
Change before reclassifications	(250)	151	(245)	309
Other comprehensive income (loss)	(250)	151	(245)	309
Balance at end of the period	(1,194)	(971)	(1,194)	(971)
Change in Certain Derivative Instruments
Increase (Decrease) Accumulated Other Comprehensive Loss, Net of Tax
Balance at beginning of the period	(34)	(17)	(43)	4
Change before reclassifications	14	(7)	22	(26)
Amounts reclassified from accumulated other comprehensive income	(2)	(7)	(3)	(9)
Translation effect	(1)
Tax effect	(1)	3		3
Other comprehensive income (loss)	10	(11)	19	(32)
Balance at end of the period	(24)	(28)	(24)	(28)
Employee Benefit Plans
Increase (Decrease) Accumulated Other Comprehensive Loss, Net of Tax
Balance at beginning of the period	(582)	(588)	(588)	(585)
Change before reclassifications			(1)	(1)
Amounts reclassified from accumulated other comprehensive income	6	4	12	8
Translation effect	1	(4)	2	(10)
Tax effect	(1)		(1)
Other comprehensive income (loss)	6		12	(3)
Balance at end of the period	(576)	(588)	(576)	(588)
Accumulated Other Comprehensive Loss.
Increase (Decrease) Accumulated Other Comprehensive Loss, Net of Tax
Balance at beginning of the period	(1,560)	(1,727)	(1,580)	(1,861)
Change before reclassifications	(236)	144	(224)	282
Amounts reclassified from accumulated other comprehensive income	4	(3)	9	(1)
Translation effect		(4)	2	(10)
Tax effect	(2)	3	(1)	3
Other comprehensive income (loss)	(234)	140	(214)	274
Balance at end of the period	$ (1,794)	$ (1,587)	$ (1,794)	$ (1,587)