CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income	$ 420	$ 611
Other comprehensive income (loss):
Net unrealized derivative instruments gains (losses) arising during the periods, net of income taxes of ($170) and ($7), respectively	(491)	(21)
Reclassification adjustment for net derivative (gains) losses included in net income, net of income taxes of ($8) and ($9), respectively	(24)	(25)
Net unrealized debt securities gains (losses) arising during the periods, net of income taxes of ($357) and ($100), respectively	(1,077)	(307)
Reclassification of net debt securities (gains) losses to net income, net of income taxes of ($1) and ($1), respectively	(3)	(2)
Reclassification of actuarial loss to net income, net of income taxes of $1 and $0, respectively	2	4
Total other comprehensive income (loss), net of income taxes	(1,593)	(351)
Total comprehensive income (loss)	$ (1,173)	$ 260