Shares and Stockholder's Equity (Schedule of Reclassifications Out Of AOCI) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment income	$ 1,409	$ 1,352
Realized gain (loss)	(394)	360
Commissions and other expenses	(1,248)	(1,213)
Income (loss) from continuing operations before taxes	(1,230)	453
Income tax benefit (expense)	302	(63)
Net income (loss)	(928)	390
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gain (Loss) on AFS Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) from continuing operations before taxes	(37)	(3)
Income tax benefit (expense)	8	1
Net income (loss)	(29)	(2)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Unrealized Gain (Loss) on Derivative Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income (loss) from continuing operations before taxes	16	17
Income tax benefit (expense)	(3)	(4)
Net income (loss)	13	13
Reclassification out of Accumulated Other Comprehensive Income [Member] | Gross Reclassification [Member] | Unrealized Gain (Loss) on AFS Securities [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Realized gain (loss)	(37)	(3)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Gross Reclassification [Member] | Unrealized Gain (Loss) on Derivative Instruments [Member] | Interest Rate Contracts [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment income		1
Reclassification out of Accumulated Other Comprehensive Income [Member] | Gross Reclassification [Member] | Unrealized Gain (Loss) on Derivative Instruments [Member] | Foreign Currency Contracts [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net investment income	14	13
Realized gain (loss)	$ 2	$ 3