Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 218	$ 187	$ 63
Other comprehensive income (loss), net of tax
Investment securities	48	(29)	(10)
Derivatives and hedging activities	0	(2)
Derivatives and hedging activities			1
Other comprehensive income (loss), net of tax	48	(31)	(9)
Comprehensive income	$ 266	$ 156	$ 54