Investments (Continuous Gross Unrealized Losses for Fixed Maturity Securities Available-For-Sale) (Details) $ in Millions	Dec. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Estimated Fair Value	$ 59,813	$ 26,345
Less than 12 months, Gross Unrealized Loss	$ 4,274	$ 1,382
Total number of securities in an unrealized loss position less than 12 months	7,220	2,922
Equal to or Greater than 12 Months, Estimated Fair Value	$ 119,976	$ 152,089
Equal to or Greater than 12 Months ,Gross Unrealized Loss	$ 26,877	$ 24,394
Total number of securities in an unrealized loss position equal or greater than 12 months	10,468	13,049
U.S. corporate
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Estimated Fair Value	$ 17,222	$ 4,722
Less than 12 months, Gross Unrealized Loss	1,586	420
Equal to or Greater than 12 Months, Estimated Fair Value	35,940	45,373
Equal to or Greater than 12 Months ,Gross Unrealized Loss	6,599	6,208
Foreign corporate
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Estimated Fair Value	10,516	3,210
Less than 12 months, Gross Unrealized Loss	709	187
Equal to or Greater than 12 Months, Estimated Fair Value	24,454	32,355
Equal to or Greater than 12 Months ,Gross Unrealized Loss	5,625	5,240
Foreign government
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Estimated Fair Value	6,462	3,913
Less than 12 months, Gross Unrealized Loss	581	246
Equal to or Greater than 12 Months, Estimated Fair Value	16,338	19,715
Equal to or Greater than 12 Months ,Gross Unrealized Loss	4,740	4,187
RMBS
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Estimated Fair Value	10,152	3,465
Less than 12 months, Gross Unrealized Loss	358	60
Equal to or Greater than 12 Months, Estimated Fair Value	13,922	17,128
Equal to or Greater than 12 Months ,Gross Unrealized Loss	2,619	2,675
U.S. government and agency
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Estimated Fair Value	9,337	7,856
Less than 12 months, Gross Unrealized Loss	687	368
Equal to or Greater than 12 Months, Estimated Fair Value	14,082	13,960
Equal to or Greater than 12 Months ,Gross Unrealized Loss	5,027	3,344
ABS & CLO
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Estimated Fair Value	2,840	1,662
Less than 12 months, Gross Unrealized Loss	88	31
Equal to or Greater than 12 Months, Estimated Fair Value	5,831	11,438
Equal to or Greater than 12 Months ,Gross Unrealized Loss	436	629
Municipals
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Estimated Fair Value	2,012	483
Less than 12 months, Gross Unrealized Loss	226	34
Equal to or Greater than 12 Months, Estimated Fair Value	4,621	5,449
Equal to or Greater than 12 Months ,Gross Unrealized Loss	1,272	1,194
CMBS
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Estimated Fair Value	1,272	1,034
Less than 12 months, Gross Unrealized Loss	39	36
Equal to or Greater than 12 Months, Estimated Fair Value	4,788	6,671
Equal to or Greater than 12 Months ,Gross Unrealized Loss	559	917
Investment Grade
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Estimated Fair Value	56,946	24,834
Less than 12 months, Gross Unrealized Loss	4,132	1,287
Equal to or Greater than 12 Months, Estimated Fair Value	116,072	146,138
Equal to or Greater than 12 Months ,Gross Unrealized Loss	26,325	23,675
Below Investment Grade
Debt Securities, Available-for-sale [Line Items]
Less than 12 months, Estimated Fair Value	2,867	1,511
Less than 12 months, Gross Unrealized Loss	142	95
Equal to or Greater than 12 Months, Estimated Fair Value	3,904	5,951
Equal to or Greater than 12 Months ,Gross Unrealized Loss	$ 552	$ 719