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Reinsurance (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended								6 Months Ended		9 Months Ended		12 Months Ended
	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2022	Jun. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Ceded Credit Risk [Line Items]
Reinsurance, ACL	$ 316.0				$ 190.0								$ 316.0	$ 190.0
Maximum retention per single insured life on fixed and VUL insurance contracts													$ 20.0
Percent of mortality risk reinsured on newly issued non-term life insurance contracts													21.00%
Reinsurance recoverables, net of allowance for credit losses	19,882.0	$ 20,045.0	$ 19,909.0	$ 20,044.0	20,295.0	$ 15,729.0	$ 15,981.0	$ 16,289.0	$ 19,909.0	$ 15,981.0	$ 20,045.0	$ 15,729.0	$ 19,882.0	20,295.0
Realized gain (loss)	(407.0)	$ 212.0	$ 515.0	$ 25.0	514.0	$ 79.0	$ 1.0	$ (180.0)	$ 540.0	$ (179.0)	$ 752.0	$ (100.0)	345.0	414.0	$ (513.0)
Swiss Re [Member]
Ceded Credit Risk [Line Items]
Trust funded to support reinsurance receivable	710,000.0				1,000.0								710,000.0	1,000.0
Reinsurance recoverables, net of allowance for credit losses					1,100.0									1,100.0
Protective [Member]
Ceded Credit Risk [Line Items]
Reinsurance recoverables, net of allowance for credit losses	10,100.0				10,700.0								10,100.0	10,700.0
Reinsurance Recoverable for Paid and Unpaid Claims and Claims Adjustments	11.5				14,000.0								11.5	14,000.0
Athene Holding Ltd. [Member]
Ceded Credit Risk [Line Items]
Reinsurance ACL and deposit assets	3,800.0				5,000.0								3,800.0	5,000.0
Amount of amortization, after-tax, of deferred gain on business sold													25.0	26.0	$ 29.0
Reserves associated with modified coinsurance reinsurance arrangements	3,809.0				5,404.0								3,809.0	5,404.0
Letter of credit	117.0												117.0
Athene Holding Ltd. [Member] | Over-Collateralization [Member]
Ceded Credit Risk [Line Items]
Reserves associated with modified coinsurance reinsurance arrangements	105.0												105.0
Resolution Life [Member]
Ceded Credit Risk [Line Items]
Reinsurance receivable	4.7												4.7
Resolution Life [Member] | Over-Collateralization [Member]
Ceded Credit Risk [Line Items]
Reinsurance Recoverables	$ 4,100.0				$ 4,100.0								4,100.0	$ 4,100.0
Realized gain (loss)													$ 635.0

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