Shareholders' Equity - Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 11,868	$ 12,275	$ 12,545
Amounts reclassified from accumulated other comprehensive loss	(91)	60	58
Other comprehensive loss, net of tax	(495)	(218)	(655)
Ending balance	11,070	11,868	12,275
Other comprehensive income (loss), tax	21	19	22
Foreign currency translation adjustments and other
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(1,942)	(1,712)	(933)
Other comprehensive (loss) income before reclassifications	(713)	(235)	(762)
Amounts reclassified from accumulated other comprehensive loss	145
Equity method affiliates	(20)	5	(17)
Other comprehensive loss, net of tax	(588)	(230)	(779)
Ending balance	(2,530)	(1,942)	(1,712)
Other comprehensive income (loss), tax	50	12	29
Unamortized actuarial gains (losses) and prior service (costs) credits
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(142)	(118)	(272)
Other comprehensive (loss) income before reclassifications	192	1	151
Amounts reclassified from accumulated other comprehensive loss	(8)	(25)	3
Other comprehensive loss, net of tax	184	(24)	154
Ending balance	42	(142)	(118)
Other comprehensive income (loss), tax	(58)	(1)	(31)
Net unrealized losses on investments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(3)	(3)	(3)
Other comprehensive loss, net of tax	0	0	0
Ending balance	(3)	(3)	(3)
Realized and unrealized gains (losses) on derivatives
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	39	3	33
Other comprehensive (loss) income before reclassifications	(45)	71	31
Amounts reclassified from accumulated other comprehensive loss	(46)	(35)	(61)
Other comprehensive loss, net of tax	(91)	36	(30)
Ending balance	(52)	39	3
Other comprehensive income (loss), tax	29	8	24
Accumulated other comprehensive loss
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(2,048)	(1,830)	(1,175)
Other comprehensive (loss) income before reclassifications	(566)	(163)	(580)
Amounts reclassified from accumulated other comprehensive loss	91	(60)	(58)
Equity method affiliates	(20)	5	(17)
Other comprehensive loss, net of tax	(495)	(218)	(655)
Ending balance	$ (2,543)	$ (2,048)	$ (1,830)