Insurance Liabilities (Balance of Account Values by range of guaranteed minimum crediting rates) (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Variable Annuities
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	$ 18,684	$ 18,520
Life
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	1,940	1,935
ULSG
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	4,975	5,042
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 0200 | Variable Annuities
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	9,299	8,782
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 0200 | Life
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	251	236
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 0200 | ULSG
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	0	0
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 0200 to 0399 | Variable Annuities
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	8,533	8,866
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 0200 to 0399 | Life
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	629	622
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 0200 to 0399 | ULSG
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	4,474	4,536
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | Variable Annuities
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	852	872
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | Life
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	1,060	1,077
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | ULSG
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	501	506
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate | Variable Annuities
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	9,163	9,642
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate | Life
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	1,060	1,077
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate | ULSG
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	1,614	1,640
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 0200 | Variable Annuities
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	604	645
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 0200 | Life
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	0	0
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 0200 | ULSG
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	0	0
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 0200 to 0399 | Variable Annuities
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	7,707	8,125
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 0200 to 0399 | Life
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	0	0
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 0200 to 0399 | ULSG
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	1,113	1,134
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | Variable Annuities
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	852	872
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | Life
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	1,060	1,077
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | ULSG
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	501	506
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 | Variable Annuities
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	409	437
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 | Life
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	449	441
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 | ULSG
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	1,463	1,485
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 0200 | Variable Annuities
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	154	204
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 0200 | Life
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	0	0
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 0200 | ULSG
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	0	0
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 0200 to 0399 | Variable Annuities
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	255	233
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 0200 to 0399 | Life
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	449	441
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 0200 to 0399 | ULSG
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	1,463	1,485
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | Variable Annuities
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	0	0
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | Life
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	0	0
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | ULSG
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	0	0
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 | Variable Annuities
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	434	502
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 | Life
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	49	49
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 | ULSG
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	1,648	1,663
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 0200 | Variable Annuities
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	284	301
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 0200 | Life
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	0	0
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 0200 | ULSG
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	0	0
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 0200 to 0399 | Variable Annuities
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	150	201
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 0200 to 0399 | Life
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	49	49
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 0200 to 0399 | ULSG
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	1,648	1,663
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | Variable Annuities
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	0	0
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | Life
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	0	0
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | ULSG
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	0	0
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater | Variable Annuities
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	8,678	7,939
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater | Life
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	382	368
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater | ULSG
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	250	254
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 0200 | Variable Annuities
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	8,257	7,632
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 0200 | Life
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	251	236
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 0200 | ULSG
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	0	0
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 0200 to 0399 | Variable Annuities
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	421	307
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 0200 to 0399 | Life
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	131	132
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 0200 to 0399 | ULSG
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	250	254
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | Variable Annuities
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	0	0
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | Life
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	0	0
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | ULSG
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	$ 0	$ 0