CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 636	$ 530	$ 1,420	$ 1,789
Other comprehensive income (loss):
Net unrealized derivative instruments gains (losses) arising during the periods, net of income taxes of ($258), ($4), ($494) and $5, respectively	(738)	(11)	(1,407)	14
Reclassification adjustment for net derivative (gains) losses included in net income, net of income taxes of $12, ($8), $1 and ($27), respectively	34	(25)	2	(77)
Net unrealized debt securities gains (losses) arising during the periods, net of income taxes of ($305), ($35), ($933) and ($132), respectively	(903)	(109)	(2,759)	(406)
Reclassification of net debt securities (gains) losses to net income, net of income taxes of $0, ($1), ($1) and ($2), respectively	0	(2)	(4)	(7)
Reclassification of actuarial loss to net income, net of income taxes of $2, $1, $1 and $2, respectively	2	20	10	28
Total other comprehensive income (loss), net of income taxes	(1,605)	(127)	(4,158)	(448)
Total comprehensive income (loss)	$ (969)	$ 403	$ (2,738)	$ 1,341