Investments (excluding Consolidated Investment Entities) - Composition of US and Foreign Corporate Securities (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Schedule of Available for Sale, including Securities Pledged [Line Items]
Fixed maturities, amortized cost	$ 31,380	$ 30,656
Fixed maturities
Schedule of Available for Sale, including Securities Pledged [Line Items]
Fixed maturities, amortized cost	34,743	34,101
Gross Unrealized Capital Gains	180	3,345
Gross Unrealized Capital Losses	3,848	149
Fixed maturities, available-for-sale, at fair value	31,039	37,251
Communications
Schedule of Available for Sale, including Securities Pledged [Line Items]
Fixed maturities, amortized cost	1,276	1,261
Gross Unrealized Capital Gains	17	238
Gross Unrealized Capital Losses	157	3
Fixed maturities, available-for-sale, at fair value	1,136	1,496
Financial
Schedule of Available for Sale, including Securities Pledged [Line Items]
Fixed maturities, amortized cost	4,289	3,752
Gross Unrealized Capital Gains	22	394
Gross Unrealized Capital Losses	560	13
Fixed maturities, available-for-sale, at fair value	3,751	4,133
Industrial and other companies
Schedule of Available for Sale, including Securities Pledged [Line Items]
Fixed maturities, amortized cost	9,003	9,600
Gross Unrealized Capital Gains	23	1,058
Gross Unrealized Capital Losses	1,172	32
Fixed maturities, available-for-sale, at fair value	7,854	10,626
Energy
Schedule of Available for Sale, including Securities Pledged [Line Items]
Fixed maturities, amortized cost	1,888	1,907
Gross Unrealized Capital Gains	29	314
Gross Unrealized Capital Losses	182	18
Fixed maturities, available-for-sale, at fair value	1,735	2,203
Utilities
Schedule of Available for Sale, including Securities Pledged [Line Items]
Fixed maturities, amortized cost	3,788	3,782
Gross Unrealized Capital Gains	13	499
Gross Unrealized Capital Losses	425	11
Fixed maturities, available-for-sale, at fair value	3,376	4,270
Transportation
Schedule of Available for Sale, including Securities Pledged [Line Items]
Fixed maturities, amortized cost	1,142	1,130
Gross Unrealized Capital Gains	2	93
Gross Unrealized Capital Losses	146	1
Fixed maturities, available-for-sale, at fair value	998	1,222
Total
Schedule of Available for Sale, including Securities Pledged [Line Items]
Fixed maturities, amortized cost	21,386	21,432
Gross Unrealized Capital Gains	106	2,596
Gross Unrealized Capital Losses	2,642	78
Fixed maturities, available-for-sale, at fair value	$ 18,850	$ 23,950

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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