Separate Accounts (Net Amount at Risk and Cash Surrender Values) (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	$ 84,799		$ 83,294
Separate account liabilities	76,257	$ 79,006	83,489
Universal Life Insurance
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	2,034	2,028	1,990	$ 1,980
Separate account liabilities	2,383		2,407
Total account balances	4,417		4,397
Net amount at risk	20,743		21,872
Cash surrender value	4,208		4,198
Variable Annuities
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	3,570	3,667	3,982	4,111
Separate account liabilities	71,389	74,483	78,834	77,086
Total account balances	74,959		82,816
Net amount at risk	13,202		12,205
Cash surrender value	74,592		82,391
Index-linked Annuities
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	47,896	48,605	44,350	41,627
Separate account liabilities	0		0
Total account balances	47,896		44,350
Cash surrender value	46,235		41,958
Fixed Rate Annuities
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	14,516	14,665	14,923	14,672
Separate account liabilities	0		0
Total account balances	14,516		14,923
Cash surrender value	14,248		14,260
ULSG
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	4,710	4,779	4,984	5,052
Separate account liabilities	0		0
Total account balances	4,710		4,984
Net amount at risk	63,157		64,837
Cash surrender value	4,269		4,455
Company-Owned Life Insurance
Net Amount at Risk by Product and Guarantee [Line Items]
Policyholder Account Balance	673	1,166	856	653
Separate account liabilities	2,241	$ 1,799	2,039	$ 2,148
Total account balances	2,914		2,895
Net amount at risk	2,599		2,671
Cash surrender value	$ 2,684		$ 2,366