Consolidated Statements of Income and Retained Earnings - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenues
Discount revenue earned from purchased Card Member receivables and loans	$ 174	$ 113	$ 359	$ 233
Interest income from affiliates and other	68	56	123	107
Finance revenue	11	10	23	19
Total revenues	253	179	505	359
Expenses
Provisions for losses	54	32	116	68
Interest expense	123	82	220	159
Interest expense to affiliates	13	6	22	11
Other, net	11	(6)	29	(1)
Total expenses	201	114	387	237
Pretax income	52	65	118	122
Income tax (benefit) provision	(5)	8	2	14
Net income	57	57	116	108
Retained earnings at beginning of period	3,370	3,165	3,311	3,114
Retained earnings at end of period	$ 3,427	$ 3,222	$ 3,427	$ 3,222