CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 511	$ 420
Other comprehensive income (loss):
Net unrealized derivative instruments gains (losses) arising during the periods, net of income taxes of $60 and ($170), respectively	173	(491)
Reclassification adjustment for net derivative (gains) losses included in net income, net of income taxes of $33 and ($8), respectively	94	(24)
Net unrealized debt securities gains (losses) arising during the periods, net of income taxes of $109 and ($357), respectively	327	(1,077)
Reclassification of net debt securities (gains) losses to net income, net of income taxes of $7 and ($1), respectively	20	(3)
Reclassification of actuarial (gain) loss to net income, net of income taxes of $1 and $1, respectively	3	2
Total other comprehensive income (loss), net of income taxes	617	(1,593)
Total comprehensive income (loss)	$ 1,128	$ (1,173)