Investments (Continuous Gross Unrealized Losses for Fixed Maturity Securities Available-For-Sale) (Details) $ in Millions	Jun. 30, 2025 USD ($)	Dec. 31, 2024 USD ($)
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	$ 48,641	$ 59,813
Less than 12 months Gross Unrealized Loss	$ 3,716	$ 4,274
Total number of securities in an unrealized loss position less than 12 months	6,118	7,220
Equal to or Greater than 12 Months Estimated Fair Value	$ 113,712	$ 119,976
Equal to or Greater than 12 Months Gross Unrealized Loss	$ 25,306	$ 26,877
Total number of securities in an unrealized loss position equal or greater than 12 months	9,686	10,468
U.S. corporate
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	$ 14,604	$ 17,222
Less than 12 months Gross Unrealized Loss	1,408	1,586
Equal to or Greater than 12 Months Estimated Fair Value	35,147	35,940
Equal to or Greater than 12 Months Gross Unrealized Loss	5,950	6,599
Foreign corporate
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	6,014	10,516
Less than 12 months Gross Unrealized Loss	452	709
Equal to or Greater than 12 Months Estimated Fair Value	23,035	24,454
Equal to or Greater than 12 Months Gross Unrealized Loss	4,146	5,625
Foreign government
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	6,698	6,462
Less than 12 months Gross Unrealized Loss	601	581
Equal to or Greater than 12 Months Estimated Fair Value	16,231	16,338
Equal to or Greater than 12 Months Gross Unrealized Loss	5,948	4,740
RMBS
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	8,042	10,152
Less than 12 months Gross Unrealized Loss	266	358
Equal to or Greater than 12 Months Estimated Fair Value	12,844	13,922
Equal to or Greater than 12 Months Gross Unrealized Loss	2,187	2,619
U.S. government and agency
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	5,811	9,337
Less than 12 months Gross Unrealized Loss	591	687
Equal to or Greater than 12 Months Estimated Fair Value	13,618	14,082
Equal to or Greater than 12 Months Gross Unrealized Loss	5,064	5,027
ABS & CLO
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	4,175	2,840
Less than 12 months Gross Unrealized Loss	93	88
Equal to or Greater than 12 Months Estimated Fair Value	4,142	5,831
Equal to or Greater than 12 Months Gross Unrealized Loss	337	436
Municipals
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	2,244	2,012
Less than 12 months Gross Unrealized Loss	259	226
Equal to or Greater than 12 Months Estimated Fair Value	4,493	4,621
Equal to or Greater than 12 Months Gross Unrealized Loss	1,256	1,272
CMBS
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	1,053	1,272
Less than 12 months Gross Unrealized Loss	46	39
Equal to or Greater than 12 Months Estimated Fair Value	4,202	4,788
Equal to or Greater than 12 Months Gross Unrealized Loss	418	559
Investment Grade
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	46,418	56,946
Less than 12 months Gross Unrealized Loss	3,612	4,132
Equal to or Greater than 12 Months Estimated Fair Value	110,383	116,072
Equal to or Greater than 12 Months Gross Unrealized Loss	24,850	26,325
Below Investment Grade
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	2,223	2,867
Less than 12 months Gross Unrealized Loss	104	142
Equal to or Greater than 12 Months Estimated Fair Value	3,329	3,904
Equal to or Greater than 12 Months Gross Unrealized Loss	$ 456	$ 552