Condensed Consolidated Statements of Shareholders’ Equity (unaudited) - USD ($) $ in Millions	Total	Preferred Stock	Preferred stock additional capital paid-in	Common stock par value	Common stock additional capital paid-in	Retained income	Deferred ESOP expense	Treasury stock	Accumulated other comprehensive income (loss)
Balance, beginning of period at Dec. 31, 2018			$ 1,930		$ 3,310	$ 44,033		$ (28,085)	$ 118
Increase (decrease) in equity
Preferred stock issuance, net of issuance costs			1,122
Preferred stock redemption			0
Forward contract on accelerated share repurchase agreement					150
Equity incentive plans activity					51
Net income	$ 3,074					3,074
Dividends on common stock (declared per share of $0.54, $0.50, $1.62 and $1.50)						(498)
Dividends on preferred stock						(103)
Shares acquired								(1,107)
Shares reissued under equity incentive plans, net								129
Change in unrealized net capital gains and losses	2,025								2,025
Change in unrealized foreign currency translation adjustments	(1)								(1)
Change in unamortized pension and other postretirement prior service credit	(35)								(35)
Balance, end of period at Sep. 30, 2019	$ 26,140	$ 0	3,052	$ 9	3,511	46,527	$ (3)	(29,063)	2,107
Increase (decrease) in equity
Dividends (in USD per share)	$ 1.5
Balance, beginning of period at Jun. 30, 2019			1,930		3,477	45,803		(28,500)	1,760
Increase (decrease) in equity
Preferred stock issuance, net of issuance costs			1,122
Preferred stock redemption			0
Forward contract on accelerated share repurchase agreement					0
Equity incentive plans activity					34
Net income	$ 931					931
Dividends on common stock (declared per share of $0.54, $0.50, $1.62 and $1.50)						(165)
Dividends on preferred stock						(42)
Shares acquired								(609)
Shares reissued under equity incentive plans, net								46
Change in unrealized net capital gains and losses	369								369
Change in unrealized foreign currency translation adjustments	(10)								(10)
Change in unamortized pension and other postretirement prior service credit	(12)								(12)
Balance, end of period at Sep. 30, 2019	$ 26,140	0	3,052	9	3,511	46,527	(3)	(29,063)	2,107
Increase (decrease) in equity
Dividends (in USD per share)	$ 0.5
Balance, beginning of period at Dec. 31, 2019	$ 25,998		2,248		3,463	48,074		(29,746)	1,950
Increase (decrease) in equity
Preferred stock issuance, net of issuance costs			0
Preferred stock redemption			(278)
Forward contract on accelerated share repurchase agreement					(38)
Equity incentive plans activity					28
Net income	2,952					2,952
Dividends on common stock (declared per share of $0.54, $0.50, $1.62 and $1.50)						(513)
Dividends on preferred stock						(89)
Shares acquired								(1,700)
Shares reissued under equity incentive plans, net								108
Change in unrealized net capital gains and losses	857								857
Change in unrealized foreign currency translation adjustments	(5)								(5)
Change in unamortized pension and other postretirement prior service credit	31								31
Balance, end of period at Sep. 30, 2020	$ 27,263	0	1,970	9	3,453	50,336	0	(31,338)	2,833
Increase (decrease) in equity
Dividends (in USD per share)	$ 1.62
Balance, beginning of period at Jun. 30, 2020			1,970		3,541	49,380		(30,542)	2,628
Increase (decrease) in equity
Preferred stock issuance, net of issuance costs			0
Preferred stock redemption			0
Forward contract on accelerated share repurchase agreement					(113)
Equity incentive plans activity					25
Net income	$ 1,153					1,153
Dividends on common stock (declared per share of $0.54, $0.50, $1.62 and $1.50)						(170)
Dividends on preferred stock						(27)
Shares acquired								(798)
Shares reissued under equity incentive plans, net								2
Change in unrealized net capital gains and losses	142								142
Change in unrealized foreign currency translation adjustments	25								25
Change in unamortized pension and other postretirement prior service credit	38								38
Balance, end of period at Sep. 30, 2020	$ 27,263	$ 0	$ 1,970	$ 9	$ 3,453	$ 50,336	$ 0	$ (31,338)	$ 2,833
Increase (decrease) in equity
Dividends (in USD per share)	$ 0.54