Income Taxes - Income from continuing operations before income tax (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income (loss) before income taxes:
Income before income taxes	$ 3,156	$ 1,931	$ 2,466
Current:
Total current tax expense	762	612	439
Deferred tax expense (benefit):
Total deferred tax expense (benefit)	(252)	11	9
Total income tax expense	510	623	448
Ireland
Income (loss) before income taxes:
Income before income taxes	85	15	(86)
Current:
Total current tax expense	2	2	2
Deferred tax expense (benefit):
Total deferred tax expense (benefit)	0	(1)	(1)
U.K.
Income (loss) before income taxes:
Income before income taxes	502	549	634
Current:
Total current tax expense	206	50	30
Deferred tax expense (benefit):
Total deferred tax expense (benefit)	(152)	131	39
U.S. federal
Income (loss) before income taxes:
Income before income taxes	161	(818)	(28)
Current:
Total current tax expense	195	197	126
Deferred tax expense (benefit):
Total deferred tax expense (benefit)	(69)	(83)	(72)
U.S. state and local
Current:
Total current tax expense	43	72	22
Deferred tax expense (benefit):
Total deferred tax expense (benefit)	(21)	(30)	(4)
Other
Income (loss) before income taxes:
Income before income taxes	2,408	2,185	1,946
Current:
Total current tax expense	316	291	259
Deferred tax expense (benefit):
Total deferred tax expense (benefit)	$ (10)	$ (6)	$ 47