Separate Accounts (Net Amount at Risk and Cash Surrender Values) (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024	Sep. 30, 2024	Dec. 31, 2023
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	$ 87,903		$ 86,836
Separate account liabilities	80,311	$ 79,006	83,439
Universal Life Insurance
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	2,055	2,028	2,011	$ 1,980
Separate account liabilities	2,681		2,509
Total account balances	4,736		4,520
Net amount at risk	20,171		21,213
Cash surrender value	4,525		4,324
Variable Annuities
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	3,380	3,667	3,773	4,111
Separate account liabilities	74,906	74,483	78,372	77,086
Total account balances	78,286		82,145
Net amount at risk	11,802		11,656
Cash surrender value	77,933		81,750
Index-linked Annuities
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	52,182	48,605	47,814	41,627
Separate account liabilities	0		0
Total account balances	52,182		47,814
Cash surrender value	51,970		46,076
Fixed Rate Annuities
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	13,777	14,665	14,883	14,672
Separate account liabilities	0		0
Total account balances	13,777		14,883
Cash surrender value	13,779		14,632
ULSG
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	4,548	4,779	4,848	5,052
Separate account liabilities	0		0
Total account balances	4,548		4,848
Net amount at risk	62,181		64,059
Cash surrender value	4,144		4,360
Company-Owned Life Insurance
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	647	1,166	667	653
Separate account liabilities	2,461	$ 1,799	2,319	$ 2,148
Total account balances	3,108		2,986
Net amount at risk	2,641		2,675
Cash surrender value	$ 2,908		$ 2,761