CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net income	$ 79	$ 3,657
Available-for-sale securities:
Unrealized gains (losses) on available-for-sale debt securities	79	(178)
Less: net realized losses on available-for-sale securities reclassified in net income	16	7
Net increase (decrease) from available-for-sale debt securities	95	(171)
Cash flow hedges:
Unrealized gains on derivative instruments	0	25
Less: net realized losses (gains) on derivative instruments reclassified in net income	8	(14)
Net increase from derivatives designated as hedging instruments	8	11
Total other comprehensive income (loss)	103	(160)
Comprehensive income	$ 182	$ 3,497