Income Taxes - Provision for benefit from income taxes from continuing operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Current tax expense:
U.S. federal taxes	$ (106)	$ (103)	$ (79)
U.S. state and local taxes	(41)	(39)	(25)
U.K. corporation tax	(40)	(13)	(33)
Other jurisdictions	(137)	(93)	(303)
Total current tax expense	(324)	(248)	(440)
Deferred tax benefit/(expense):
U.S. federal taxes	20	52	(41)
U.S. state and local taxes	15	(5)	3
U.K. corporation tax	63	(7)	(65)
Other jurisdictions	11	14	7
Total deferred tax benefit/(expense)	109	54	(96)
Total provision for income taxes	$ (215)	$ (194)	$ (536)