Accumulated Other Comprehensive Loss - Changes in Accumulated Other Comprehensive Loss by Component, After Tax and Minority Interest (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 5,466	$ 5,184	$ 3,259
Ending balance	4,837	5,466	5,184
Foreign Currency Translation Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(1,663)	(1,402)	(1,284)
Other comprehensive income (loss) before reclassifications	50	(261)	(118)
Amounts reclassified from accumulated other comprehensive loss	0	0	0
Ending balance	(1,613)	(1,663)	(1,402)
Unrealized Gains (Losses) from Securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	1	0	0
Other comprehensive income (loss) before reclassifications	0	1	0
Amounts reclassified from accumulated other comprehensive loss	0	0	0
Ending balance	1	1	0
Unrecognized Net Actuarial Losses and Prior Service Costs
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(2,215)	(2,565)	(2,856)
Other comprehensive income (loss) before reclassifications	(125)	162	153
Amounts reclassified from accumulated other comprehensive loss	116	188	138
Ending balance	(2,224)	(2,215)	(2,565)
Deferred Derivative Gains (Losses)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	2	4	5
Other comprehensive income (loss) before reclassifications	(5)	0	1
Amounts reclassified from accumulated other comprehensive loss	4	(2)	(2)
Ending balance	1	2	4
Total
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(3,875)	(3,963)	(4,135)
Other comprehensive income (loss) before reclassifications	(80)	(98)	36
Amounts reclassified from accumulated other comprehensive loss	120	186	136
Ending balance	$ (3,835)	$ (3,875)	$ (3,963)