Insurance Liabilities (Balance of Account Values by range of guaranteed minimum crediting rates) (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Variable Annuities
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	$ 17,697	$ 18,210
Life Insurance
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	1,999	1,974
ULSG
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	4,533	4,762
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	$ 9,194	$ 9,607
Policyholder Account Balance, Guaranteed Minimum Credit Rating	2.00%	2.00%
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 0200 | Life Insurance
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	$ 387	$ 308
Policyholder Account Balance, Guaranteed Minimum Credit Rating	2.00%	2.00%
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 Credit Rating	2.00%	2.00%
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	$ 7,735	$ 7,822
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 0200 to 0399 | Variable Annuities | Minimum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance, Guaranteed Minimum Credit Rating	2.00%	2.00%
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 0200 to 0399 | Variable Annuities | Maximum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance, Guaranteed Minimum Credit Rating	3.99%	3.99%
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 0200 to 0399 | Life Insurance
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	$ 634	$ 646
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 0200 to 0399 | Life Insurance | Minimum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance, Guaranteed Minimum Credit Rating	2.00%	2.00%
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 0200 to 0399 | Life Insurance | Maximum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance, Guaranteed Minimum Credit Rating	3.99%	3.99%
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	$ 4,041	$ 4,278
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 0200 to 0399 | ULSG | Minimum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance, Guaranteed Minimum Credit Rating	2.00%	2.00%
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 0200 to 0399 | ULSG | Maximum
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balance, Guaranteed Minimum Credit Rating	3.99%	3.99%
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	$ 768	$ 781
Policyholder Account Balance, Guaranteed Minimum Credit Rating	3.99%	3.99%
Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | Life Insurance
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	$ 978	$ 1,020
Policyholder Account Balance, Guaranteed Minimum Credit Rating	3.99%	3.99%
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	$ 492	$ 484
Policyholder Account Balance, Guaranteed Minimum Credit Rating	3.99%	3.99%
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	$ 7,477	$ 7,930
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate | Life Insurance
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	978	1,020
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	1,480	1,536
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	412	516
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range Less Than 0200 | Life Insurance
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	6,297	6,633
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range From 0200 to 0399 | Life Insurance
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	988	1,052
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	768	781
Policyholder Account Balance, at Guaranteed Minimum Crediting Rate | Policyholder Account Balance, Guaranteed Minimum Crediting Rate, Range from 0400 and Greater | Life Insurance
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	978	1,020
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	492	484
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	685	551
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0001 to 0050 | Life Insurance
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	473	471
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	1,309	1,386
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	137	112
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 Insurance
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	548	439
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 Insurance
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	473	471
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	1,309	1,386
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 Insurance
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	773	646
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0051 to 0150 | Life Insurance
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	43	47
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	1,518	1,602
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	215	230
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 Insurance
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	558	416
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 Insurance
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	43	47
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	1,518	1,602
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 Insurance
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	8,762	9,083
Policyholder Account Balance, above Guaranteed Minimum Crediting Rate, Range from 0151 and Greater | Life Insurance
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	505	436
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	226	238
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	8,430	8,749
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 Insurance
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	387	308
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	332	334
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 Insurance
Policyholder Account Balance, Guaranteed Minimum Crediting Rate [Line Items]
Policyholder Account Balances gross of policy loans and excludes excessing interest reserves	118	128
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	226	238
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 Insurance
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