Variable Interest Entities - Consolidated VIEs (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023		Dec. 31, 2022		Dec. 31, 2021	Jan. 01, 2021
Assets:
Bonds available for sale	[1]	$ 231,733		$ 226,156
Other bond securities, at fair value (See Note 5)	[1]	5,241		4,485
Equity securities	[1]	728		575
Mortgage and other loans receivable	[1]	51,553		49,605
Alternative investments		11,320		11,809
Investment real estate		2,237		2,153
Short-term investments	[1]	17,200		12,376
Cash		2,155	[1]	2,043	[1]	$ 2,198
Accrued investment income	[1]	2,588		2,376
Other assets		13,089	[1]	12,384	[1]		$ 13,520
Total assets		539,306		522,228			598,841
Liabilities:
Other		25,958	[1]	26,757	[1]		27,520
Total liabilities		488,005		478,774			$ 532,906
Real Estate and Investment Entities
Liabilities:
Off-balance sheet exposure associated with VIEs		1,900		2,100
Real Estate and Investment Entities | External parties
Liabilities:
Off-balance sheet exposure associated with VIEs		400		600
Consolidated VIE
Assets:
Bonds available for sale		184		3,672
Other bond securities, at fair value (See Note 5)		45
Equity securities		8		51
Mortgage and other loans receivable		2,063		2,221
Alternative investments		2,695		2,842
Investment real estate		1,488		1,731
Short-term investments		135		472
Cash		61		71
Accrued investment income		9		9
Other assets		96		172
Total assets		6,784		11,241
Liabilities:
Debt		2,200		5,694
Other		83		132
Total liabilities		2,283		5,826
Consolidated VIE | Real Estate and Investment Entities
Assets:
Bonds available for sale		36		0
Other bond securities, at fair value (See Note 5)		45
Equity securities		8		51
Mortgage and other loans receivable		0		0
Alternative investments		2,695		2,842
Investment real estate		1,488		1,731
Short-term investments		125		191
Cash		61		71
Accrued investment income		2		0
Other assets		94		102
Total assets		4,554		4,988
Liabilities:
Debt		1,094		1,358
Other		82		85
Total liabilities		1,176		1,443
Consolidated VIE | Securitization Vehicles
Assets:
Bonds available for sale		148		3,672
Other bond securities, at fair value (See Note 5)		0
Equity securities		0		0
Mortgage and other loans receivable		2,063		2,221
Alternative investments		0		0
Investment real estate		0		0
Short-term investments		10		281
Cash		0		0
Accrued investment income		7		9
Other assets		2		70
Total assets		2,230		6,253
Liabilities:
Debt		1,106		4,336
Other		1		47
Total liabilities		1,107		4,383
Unconsolidated VIE
Assets:
Total assets		9,183		$ 9,392
Unconsolidated VIE | Securitization Vehicles
Assets:
Total assets		3,600
Liabilities:
Total liabilities		3,100
Pre-tax loss on deconsolidation		$ 14

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