Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2021		Jun. 30, 2020		Jun. 30, 2021		Jun. 30, 2020
Non-interest revenues
Non-interest revenues	$ 8,425		$ 5,791		$ 15,659		$ 13,771
Interest income
Interest on loans	2,094		2,368		4,238		5,277
Interest and dividends on investment securities	24		27		48		65
Deposits with banks and other	22		31		46		130
Total interest income	2,140		2,426		4,332		5,472
Interest expense
Deposits	113		260		247		586
Long-term debt and other	209		282		437		672
Total interest expense	322		542		684		1,258
Net interest income	1,818		1,884		3,648		4,214
Total revenues net of interest expense	10,243		7,675		19,307		17,985
Provisions for credit losses
Provisions	(606)		1,555		(1,281)		4,176
Total revenues net of interest expense after provisions for credit losses	10,849		6,120		20,588		13,809
Expenses
Marketing and business development	2,219		1,362		3,985		3,067
Card Member rewards	2,712		1,349		4,955		3,741
Card Member services	432		208		749		664
Salaries and employee benefits	1,539		1,349		3,089		2,744
Other, net	1,007		1,230		1,877		2,519
Total expenses	7,909		5,498		14,655		12,735
Pretax income	2,940		622		5,933		1,074
Income tax provision	660		365		1,418		450
Net income	$ 2,280		$ 257		$ 4,515		$ 624
Earnings per Common Share
Basic (in dollars per share)	$ 2.81	[1]	$ 0.29	[1]	$ 5.55	[2]	$ 0.71	[2]
Diluted (in dollars per share)	$ 2.80	[1]	$ 0.29	[1]	$ 5.54	[2]	$ 0.71	[2]
Average common shares outstanding for earnings per common share:
Basic (in shares)	801		804		802		806
Diluted (in shares)	802		805		803		807
Card Member Receivables
Provisions for credit losses
Provisions	$ (125)		$ 355		$ (135)		$ 952
Card Member Loans
Provisions for credit losses
Provisions	(396)		969		(969)		2,845
Other Loans
Provisions for credit losses
Provisions	(85)		231		(177)		379
Discount revenue
Non-interest revenues
Non-interest revenues	6,327		4,015		11,569		9,853
Net card fees
Non-interest revenues
Non-interest revenues	1,286		1,141		2,539		2,251
Other fees and commissions
Non-interest revenues
Non-interest revenues	560		449		1,080		1,169
Other
Non-interest revenues
Non-interest revenues	$ 252		$ 186		$ 471		$ 498

[1] Represents net income less (i) earnings allocated to participating share awards of $16 million and $2 million for the three months ended June 30, 2021 and 2020, respectively, and (ii) dividends on preferred shares of $15 million and $17 million for the three months ended June 30, 2021 and 2020, respectively.

[2] Represents net income less (i) earnings allocated to participating share awards of $31 million and $4 million for the six months ended June 30, 2021 and 2020, respectively, and (ii) dividends on preferred shares of $29 million and $49 million for the six months ended June 30, 2021 and 2020, respectively.