Derivative Instruments (Gains (Losses) On Derivative Instruments Designated As Cash Flow Hedges) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Gains (losses) on derivative instruments designated and qualifying as cash flow hedges
Offset to net investment income	$ 6,115,000,000	$ 5,510,000,000	$ 5,223,000,000
Offset to realized gain (loss)	(212,000,000)	(513,000,000)	(610,000,000)
Offset to interest and debt expense	$ (270,000,000)	$ (284,000,000)	$ (326,000,000)