Equity (Balance of and Changes in Each Component of AOCI) (Details) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021
Accumulated Other Comprehensive Income (Loss), Net of Tax		$ 3,642	$ 5,359
Other comprehensive income (loss) before reclassifications		(9,466)	(1,555)
Amounts reclassified to (from) AOCI		310	(151)
Deferred income tax benefit (expense)		1,955	388
Accumulated Other Comprehensive Income (Loss), Net of Tax		(3,559)	4,041
Accumulated Translation Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax		(9)	(69)
Other comprehensive income (loss) before reclassifications		(4)	55
Amounts reclassified to (from) AOCI		0	0
Deferred income tax benefit (expense)		26	6
Accumulated Other Comprehensive Income (Loss), Net of Tax		(39)	(20)
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]	(9,459)	(1,607)
Amounts reclassified to (from) AOCI	[1]	308	(154)
Deferred income tax benefit (expense)	[1]	1,981	394
Accumulated Other Comprehensive Income (Loss), Net of Tax	[1]	(3,469)	4,133
Accumulated Defined Benefit Plans Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net of Tax		(50)	(72)
Other comprehensive income (loss) before reclassifications		(3)	(3)
Amounts reclassified to (from) AOCI		2	3
Deferred income tax benefit (expense)		0	0
Accumulated Other Comprehensive Income (Loss), Net of Tax		$ (51)	$ (72)

[1] Includes cash flow hedges of $(206) and $(22) as of June 30, 2022 and December 31, 2021, respectively, and $(40) and $(49) as of June 30, 2021 and December 31, 2020, respectively. See Note 5 – “Derivative Instruments” for additional information on cash flow hedges.