Consolidated Statements of Income and Retained Earnings - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenues
Discount revenue earned from purchased Card Member receivables and loans	$ 199	$ 119	$ 558	$ 352
Interest income from affiliates and other	75	51	198	158
Finance revenue	12	10	35	29
Total revenues	286	180	791	539
Expenses
Provisions for losses	60	37	176	105
Interest expense	139	80	359	239
Interest expense to affiliates	17	5	39	16
Other, net	(15)	(12)	14	(13)
Total expenses	201	110	588	347
Pretax income	85	70	203	192
Income tax provision	13	10	15	24
Net income	72	60	188	168
Retained earnings at beginning of period	3,427	3,222	3,311	3,114
Retained earnings at end of period	$ 3,499	$ 3,282	$ 3,499	$ 3,282