Equity (Balance of and Changes in Each Component of AOCI) (Details) - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2022	Sep. 30, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax		$ 3,642	$ 5,359
Other comprehensive income (loss) before reclassifications		(12,574)	(2,108)
Amounts reclassified to (from) AOCI		420	(175)
Deferred income tax benefit (expense)		2,548	507
Accumulated Other Comprehensive Income (Loss), Net of Tax		(5,964)	3,583
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax		(9)	(69)
Other comprehensive income (loss) before reclassifications		(173)	33
Amounts reclassified to (from) AOCI		0	0
Deferred income tax benefit (expense)		34	14
Accumulated Other Comprehensive Income (Loss), Net of Tax		(216)	(50)
Accumulated Net Unrealized Investment Gain (Loss) [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax	[1]	3,701	5,500
Other comprehensive income (loss) before reclassifications	[1]	(12,398)	(2,136)
Amounts reclassified to (from) AOCI	[1]	418	(181)
Deferred income tax benefit (expense)	[1]	2,582	521
Accumulated Other Comprehensive Income (Loss), Net of Tax	[1]	(5,697)	3,704
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax		(50)	(72)
Other comprehensive income (loss) before reclassifications		(3)	(5)
Amounts reclassified to (from) AOCI		2	6
Deferred income tax benefit (expense)		0	0
Accumulated Other Comprehensive Income (Loss), Net of Tax		$ (51)	$ (71)

[1] Includes cash flow hedges of $(230) and $(22) as of September 30, 2022 and December 31, 2021, respectively, and $(55) and $(49) as of September 30, 2021 and December 31, 2020, respectively. See Note 5 – “Derivative Instruments” for additional information on cash flow hedges.