Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net income for the period	$ 153	$ 204
Other comprehensive income, net of tax:
Net unrealized holding gains (losses) on investment securities	12	77
Unrealized loss amortization associated with the securities transferred from AFS to HTM	46	49
Net unrealized holding gains (losses) on derivative instruments	(1)	29
Reclassification adjustment for decrease in interest income recognized in earnings on derivative instruments	26	37
Other comprehensive income, net of tax	83	192
Comprehensive income	$ 236	$ 396