Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Increase (Decrease) Accumulated Other Comprehensive Loss, Net of Tax
Other comprehensive income (loss)	$ (68)	$ (85)	$ (289)	$ 195
Net Effect of Exchange Rate Fluctuations
Increase (Decrease) Accumulated Other Comprehensive Loss, Net of Tax
Balance at beginning of the period	(1,194)	(971)	(949)	(1,280)
Change before reclassifications	(42)	(105)	(287)	204
Other comprehensive income (loss)	(42)	(105)	(287)	204
Balance at end of the period	(1,236)	(1,076)	(1,236)	(1,076)
Change in Certain Derivative Instruments
Increase (Decrease) Accumulated Other Comprehensive Loss, Net of Tax
Balance at beginning of the period	(24)	(28)	(43)	4
Change before reclassifications	(17)	11	5	(15)
Amounts reclassified from accumulated other comprehensive income	(2)	(6)	(5)	(15)
Translation effect	(1)	3	(1)	3
Tax effect		2		5
Other comprehensive income (loss)	(20)	10	(1)	(22)
Balance at end of the period	(44)	(18)	(44)	(18)
Employee Benefit Plans
Increase (Decrease) Accumulated Other Comprehensive Loss, Net of Tax
Balance at beginning of the period	(576)	(588)	(588)	(585)
Change before reclassifications	(20)		(21)	(1)
Amounts reclassified from accumulated other comprehensive income	6	5	18	13
Translation effect	8	5	10	(5)
Tax effect	(1)	(1)	(2)	(1)
Other comprehensive income (loss)	(7)	9	5	6
Balance at end of the period	(583)	(579)	(583)	(579)
Accumulated Other Comprehensive Loss.
Increase (Decrease) Accumulated Other Comprehensive Loss, Net of Tax
Balance at beginning of the period	(1,794)	(1,587)	(1,580)	(1,861)
Change before reclassifications	(79)	(94)	(303)	188
Amounts reclassified from accumulated other comprehensive income	4	(1)	13	(2)
Translation effect	7	8	9	(2)
Tax effect	(1)	1	(2)	4
Other comprehensive income (loss)	(69)	(86)	(283)	188
Balance at end of the period	$ (1,863)	$ (1,673)	$ (1,863)	$ (1,673)