Consolidated Statements of Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues
Discount revenue earned from purchased Card Member receivables and loans	$ 760	$ 471	$ 479
Interest income from affiliates and other	279	207	246
Finance revenue	48	40	30
Total revenues	1,087	718	755
Expenses
Provisions for losses	244	151	165
Interest expense	495	317	350
Interest expense to affiliates	58	24	10
Other, net	15	14	(22)
Total expenses	812	506	503
Pretax income	275	212	252
Income tax provision	878	15	38
Net (loss) income	$ (603)	$ 197	$ 214