Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2021		Jun. 30, 2020		Jun. 30, 2021		Jun. 30, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 1,265	[1]	$ 671	[1]	$ 2,749	[1]	$ 1,466	[2]
Change in net unrealized gain (loss) on available for sale securities:
Net unrealized gain (loss)	2,016		2,113		(3,901)		7,264
Other reclassifications included in other revenue	(4)		0		(14)		0
Other	0		1		0		1
Other comprehensive income (loss), before tax	2,012		2,114		(3,915)		7,265
Income tax effect	(482)		(498)		929		(1,742)
Other comprehensive income (loss), net of tax	1,530		1,616		(2,986)		5,523
Comprehensive Income (Loss)	$ 2,795		$ 2,287		$ (237)		$ 6,989

[1] Certain prior year amounts have been reclassified to conform to the current year presentation. See Note 1 for additional information.

[2] Certain prior year amounts have been reclassified to conform to the current year presentation. See Note 1 for additional information.