Separate Accounts (Net Amount at Risk and Cash Surrender Values) (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024	Dec. 31, 2023
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	$ 87,240		$ 85,015
Separate account liabilities	79,403	$ 79,006	81,575
Universal Life Insurance
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	2,040	2,028	1,998	$ 1,980
Separate account liabilities	2,587		2,406
Total account balances	4,627		4,404
Net amount at risk	20,454		21,572
Cash surrender value	4,420		4,202
Variable Annuities
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	3,476	3,667	3,865	4,111
Separate account liabilities	74,173	74,483	76,697	77,086
Total account balances	77,649		80,562
Net amount at risk	12,234		12,577
Cash surrender value	77,283		80,155
Index-linked Annuities
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	50,237	48,605	46,089	41,627
Separate account liabilities	0		0
Total account balances	50,237		46,089
Cash surrender value	49,450		43,846
Fixed Rate Annuities
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	14,619	14,665	14,726	14,672
Separate account liabilities	0		0
Total account balances	14,619		14,726
Cash surrender value	14,509		14,063
ULSG
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	4,619	4,779	4,914	5,052
Separate account liabilities	0		0
Total account balances	4,619		4,914
Net amount at risk	62,652		64,450
Cash surrender value	4,195		4,414
Company-Owned Life Insurance
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	645	1,166	659	653
Separate account liabilities	2,391	$ 1,799	2,252	$ 2,148
Total account balances	3,036		2,911
Net amount at risk	2,634		2,661
Cash surrender value	$ 2,836		$ 2,583