Fair Value Measurements - Carrying values and estimated fair values of our financial instruments not measured at fair value (Details) - USD ($) $ in Millions		Dec. 31, 2023		Dec. 31, 2022		Dec. 31, 2021	Jan. 01, 2021
Assets:
Mortgage and other loans receivable	[1]	$ 51,553		$ 49,605
Other invested assets	[1]	16,217		15,953
Short-term investments	[1]	17,200		12,376
Cash		2,155	[1]	2,043	[1]	$ 2,198
Other assets		13,089	[1]	12,384	[1]		$ 13,520
Liabilities:
Fortitude Re funds withheld payable		29,484		30,383
Other liabilities(c)		25,958	[1]	26,757	[1]		$ 27,520
Short-term and long-term debt		22,387		27,179
Assets held for sale		2,268		0
Liabilities held for sale		1,775		0
Assets held-for-sale
Liabilities:
Assets held for sale		2,268
Liabilities held for sale		1,775
Estimated Fair Value
Assets:
Mortgage and other loans receivable		48,536		45,844
Other invested assets		919		854
Short-term investments		6,428		6,668
Cash		2,155		2,043
Other assets		45		33
Liabilities:
Policyholder contract deposits associated with investment-type contracts		130,184		129,293
Fortitude Re funds withheld payable		30,710		32,618
Other liabilities(c)		2,467		3,101
Separate account liabilities - investment contracts		87,215		80,649
Carrying Value
Assets:
Mortgage and other loans receivable		51,553		49,442
Other invested assets		919		854
Short-term investments		6,428		6,668
Cash		2,155		2,043
Other assets		45		33
Liabilities:
Policyholder contract deposits associated with investment-type contracts		140,652		137,086
Fortitude Re funds withheld payable		30,710		32,618
Other liabilities(c)		2,467		3,101
Separate account liabilities - investment contracts		87,215		80,649
Carrying Value | Assets held-for-sale
Assets:
Short-term investments		11
Cash		3
Liabilities:
Other liabilities(c)		45
Level 1 | Estimated Fair Value
Assets:
Mortgage and other loans receivable		0		0
Other invested assets		0		0
Short-term investments		0		0
Cash		2,155		2,043
Other assets		45		24
Liabilities:
Policyholder contract deposits associated with investment-type contracts		0		0
Fortitude Re funds withheld payable		0		0
Other liabilities(c)		0		0
Separate account liabilities - investment contracts		0		0
Level 2 | Estimated Fair Value
Assets:
Mortgage and other loans receivable		272		89
Other invested assets		913		848
Short-term investments		6,428		6,668
Cash		0		0
Other assets		0		9
Liabilities:
Policyholder contract deposits associated with investment-type contracts		90		119
Fortitude Re funds withheld payable		0		0
Other liabilities(c)		2,467		3,101
Separate account liabilities - investment contracts		87,215		80,649
Level 3 | Estimated Fair Value
Assets:
Mortgage and other loans receivable		48,264		45,755
Other invested assets		6		6
Short-term investments		0		0
Cash		0		0
Other assets		0		0
Liabilities:
Policyholder contract deposits associated with investment-type contracts		130,094		129,174
Fortitude Re funds withheld payable		30,710		32,618
Other liabilities(c)		0		0
Separate account liabilities - investment contracts		$ 0		$ 0

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