Investments (Continuous Gross Unrealized Losses for Fixed Maturity Securities Available-For-Sale) (Details) $ in Millions	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	$ 125,181	$ 62,019
Less than 12 months Gross Unrealized Loss	$ 6,873	$ 1,264
Total number of securities in an unrealized loss position less than 12 months	10,263	4,774
Equal to or Greater than 12 Months Estimated Fair Value	$ 18,721	$ 13,224
Equal to or Greater than 12 Months Gross Unrealized Loss	$ 2,670	$ 1,154
Total number of securities in an unrealized loss position equal or greater than 12 months	1,652	979
U.S. corporate
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	$ 28,039	$ 8,076
Less than 12 months Gross Unrealized Loss	1,726	165
Equal to or Greater than 12 Months Estimated Fair Value	2,560	1,499
Equal to or Greater than 12 Months Gross Unrealized Loss	355	116
Foreign corporate
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	24,694	10,011
Less than 12 months Gross Unrealized Loss	1,679	404
Equal to or Greater than 12 Months Estimated Fair Value	3,465	2,834
Equal to or Greater than 12 Months Gross Unrealized Loss	487	327
Foreign government
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	14,173	7,812
Less than 12 months Gross Unrealized Loss	886	319
Equal to or Greater than 12 Months Estimated Fair Value	6,360	5,377
Equal to or Greater than 12 Months Gross Unrealized Loss	1,071	502
U.S. government and agency
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	16,795	14,419
Less than 12 months Gross Unrealized Loss	724	138
Equal to or Greater than 12 Months Estimated Fair Value	2,225	1,571
Equal to or Greater than 12 Months Gross Unrealized Loss	420	138
RMBS
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	16,253	10,363
Less than 12 months Gross Unrealized Loss	889	158
Equal to or Greater than 12 Months Estimated Fair Value	2,143	417
Equal to or Greater than 12 Months Gross Unrealized Loss	235	30
ABS & CLO
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	14,605	8,150
Less than 12 months Gross Unrealized Loss	347	39
Equal to or Greater than 12 Months Estimated Fair Value	1,127	804
Equal to or Greater than 12 Months Gross Unrealized Loss	47	20
Municipals
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	4,175	524
Less than 12 months Gross Unrealized Loss	382	10
Equal to or Greater than 12 Months Estimated Fair Value	84	65
Equal to or Greater than 12 Months Gross Unrealized Loss	16	3
CMBS
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	6,447	2,664
Less than 12 months Gross Unrealized Loss	240	31
Equal to or Greater than 12 Months Estimated Fair Value	757	657
Equal to or Greater than 12 Months Gross Unrealized Loss	39	18
Investment Grade
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	118,393	58,358
Less than 12 months Gross Unrealized Loss	6,493	1,123
Equal to or Greater than 12 Months Estimated Fair Value	17,480	12,022
Equal to or Greater than 12 Months Gross Unrealized Loss	$ 2,498	1,025
Total number of securities in an unrealized loss position equal or greater than 12 months	1,462
Below Investment Grade
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	$ 6,788	3,661
Less than 12 months Gross Unrealized Loss	380	141
Equal to or Greater than 12 Months Estimated Fair Value	1,241	1,202
Equal to or Greater than 12 Months Gross Unrealized Loss	$ 172	$ 129
Total number of securities in an unrealized loss position equal or greater than 12 months	190

Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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