Investments (Continuous Gross Unrealized Losses for Fixed Maturity Securities Available-For-Sale) (Details) $ in Millions	Sep. 30, 2024 USD ($)	Dec. 31, 2023 USD ($)
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	$ 18,152	$ 26,345
Less than 12 months Gross Unrealized Loss	$ 1,649	$ 1,382
Total number of securities in an unrealized loss position less than 12 months	2,855	2,922
Equal to or Greater than 12 Months Estimated Fair Value	$ 136,467	$ 152,089
Equal to or Greater than 12 Months Gross Unrealized Loss	$ 21,852	$ 24,394
Total number of securities in an unrealized loss position equal or greater than 12 months	11,063	13,049
U.S. corporate
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	$ 4,384	$ 4,722
Less than 12 months Gross Unrealized Loss	685	420
Equal to or Greater than 12 Months Estimated Fair Value	41,061	45,373
Equal to or Greater than 12 Months Gross Unrealized Loss	5,258	6,208
Foreign corporate
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	2,505	3,210
Less than 12 months Gross Unrealized Loss	181	187
Equal to or Greater than 12 Months Estimated Fair Value	28,069	32,355
Equal to or Greater than 12 Months Gross Unrealized Loss	4,477	5,240
Foreign government
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	2,828	3,913
Less than 12 months Gross Unrealized Loss	432	246
Equal to or Greater than 12 Months Estimated Fair Value	19,170	19,715
Equal to or Greater than 12 Months Gross Unrealized Loss	4,735	4,187
U.S. government and agency
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	3,426	7,856
Less than 12 months Gross Unrealized Loss	159	368
Equal to or Greater than 12 Months Estimated Fair Value	15,987	13,960
Equal to or Greater than 12 Months Gross Unrealized Loss	3,481	3,344
RMBS
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	1,926	3,465
Less than 12 months Gross Unrealized Loss	73	60
Equal to or Greater than 12 Months Estimated Fair Value	15,673	17,128
Equal to or Greater than 12 Months Gross Unrealized Loss	2,053	2,675
ABS & CLO
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	2,441	1,662
Less than 12 months Gross Unrealized Loss	17	31
Equal to or Greater than 12 Months Estimated Fair Value	5,833	11,438
Equal to or Greater than 12 Months Gross Unrealized Loss	341	629
Municipals
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	209	483
Less than 12 months Gross Unrealized Loss	87	34
Equal to or Greater than 12 Months Estimated Fair Value	5,241	5,449
Equal to or Greater than 12 Months Gross Unrealized Loss	990	1,194
CMBS
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	433	1,034
Less than 12 months Gross Unrealized Loss	15	36
Equal to or Greater than 12 Months Estimated Fair Value	5,433	6,671
Equal to or Greater than 12 Months Gross Unrealized Loss	517	917
Investment Grade
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	15,804	24,834
Less than 12 months Gross Unrealized Loss	1,577	1,287
Equal to or Greater than 12 Months Estimated Fair Value	131,959	146,138
Equal to or Greater than 12 Months Gross Unrealized Loss	21,256	23,675
Below Investment Grade
Debt Securities, Available-for-sale [Line Items]
Less than 12 months Estimated Fair Value	2,348	1,511
Less than 12 months Gross Unrealized Loss	72	95
Equal to or Greater than 12 Months Estimated Fair Value	4,508	5,951
Equal to or Greater than 12 Months Gross Unrealized Loss	$ 596	$ 719