Investments - Mortgage Loans, Net Past Due (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Mortgage loans		$ 24,148
Commercial Real Estate Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Mortgage loans	$ 20,108	16,897
Financing Receivable, Year One, Originated, Current Fiscal Year		6,055
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		1,852
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		4,129
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		2,731
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		1,042
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		1,255
Financing Receivable, before Allowance for Credit Loss		17,064
Commercial Real Estate Portfolio Segment [Member] \| Financial Asset, 1 to 29 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year		6,003
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		1,852
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		4,129
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		2,731
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		952
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		1,255
Financing Receivable, before Allowance for Credit Loss		16,922
Commercial Real Estate Portfolio Segment [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year		52
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		90
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		0
Financing Receivable, before Allowance for Credit Loss		142
Residential Mortgage [Member]
Financing Receivable, Past Due [Line Items]
Mortgage loans	10,703	7,251
Financing Receivable, Year One, Originated, Current Fiscal Year		2,561
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		505
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		125
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		475
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		208
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		3,447
Financing Receivable, before Allowance for Credit Loss	$ 11,802	7,321
Financing Receivable, 90 Days or More Past Due, Still Accruing		856
Residential Mortgage [Member] \| Financial Asset, 1 to 29 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year		2,398
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		319
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		37
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		383
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		54
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		2,568
Financing Receivable, before Allowance for Credit Loss		5,759
Residential Mortgage [Member] \| Financial Asset, 30 to 59 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year		100
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		37
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		3
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		3
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		6
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		223
Financing Receivable, before Allowance for Credit Loss		372
Residential Mortgage [Member] \| Financial Asset, 60 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year		36
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		16
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		3
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		2
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		7
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		136
Financing Receivable, before Allowance for Credit Loss		200
Residential Mortgage [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, Year One, Originated, Current Fiscal Year		27
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year		133
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year		82
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year		87
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year		141
Financing Receivable, Originated, More than Five Years before Current Fiscal Year		520
Financing Receivable, before Allowance for Credit Loss		990
Residential Mortgage [Member] \| Financial Asset, Equal to or Greater than 90 Days Past Due \| Loans Insured or Guaranteed by US Government Authorities
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss		$ 856

Amortized cost of financing receivable originated more than five years prior to current fiscal year. Excludes net investment in lease.

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Amortized cost of financing receivable originated three years prior to current fiscal year. Excludes net investment in lease.

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The balance represents the amount of loans that are secured by real estate mortgages, offset by the reserve to cover probable credit losses on the loan portfolio.

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Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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