Investments - Other Invested Assets – Equity Method Investments (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Jan. 01, 2021
Investments [Line Items]
Total revenues		$ 46,802	$ 54,450	$ 52,157
Net income		3,643	10,227	10,367
Total assets		539,306	522,228		$ 598,841
Total liabilities		(488,005)	(478,774)		$ (532,906)
Equity method investments		5,500	6,000
Other invested assets	[1]	16,217	15,953
DaVinciRe Holdings Ltd
Investments [Line Items]
Other invested assets		300
Equity Method Investee
Investments [Line Items]
Total revenues		4,589	28,500	31,560
Total expenses		(2,212)	(2,789)	(2,241)
Net income		2,377	25,711	$ 29,319
Total assets		59,359	134,435
Total liabilities		$ (5,893)	$ (14,701)

[1] See Note 10 for details of balances associated with variable interest entities.