Loans and Accounts Receivable (Details 2) - USD ($) $ in Millions	Jun. 30, 2016	Dec. 31, 2015
U S Consumer Services [Member] | Card Member Loans [Member] | Financing Receivables Period Past Due [Domain]
Accounts Receivables [Line Items]
Current	$ 44,120	$ 43,063
Total aging	44,594	43,495
U S Consumer Services [Member] | Card Member Loans [Member]
Accounts Receivables [Line Items]
Past Due	128	128
U S Consumer Services [Member] | Card Member Loans [Member] | Financing Receivables 60 To 89 Days Past Due [Member]
Accounts Receivables [Line Items]
Past Due	100	94
U S Consumer Services [Member] | Card Member Loans [Member] | Financing Receivables Equal To Greater Than 90 Days Past Due [Member]
Accounts Receivables [Line Items]
Past Due	246	210
U S Consumer Services [Member] | Card Member Receivables [Member] | Financing Receivables Period Past Due [Domain]
Accounts Receivables [Line Items]
Current	10,464	11,646
Total aging	10,587	11,807
U S Consumer Services [Member] | Card Member Receivables [Member]
Accounts Receivables [Line Items]
Past Due	44	54
U S Consumer Services [Member] | Card Member Receivables [Member] | Financing Receivables 60 To 89 Days Past Due [Member]
Accounts Receivables [Line Items]
Past Due	24	32
U S Consumer Services [Member] | Card Member Receivables [Member] | Financing Receivables Equal To Greater Than 90 Days Past Due [Member]
Accounts Receivables [Line Items]
Past Due	55	75
International Consumer and Network Services [Member] | Card Member Loans [Member] | Financing Receivables Period Past Due [Domain]
Accounts Receivables [Line Items]
Current	6,491	6,961
Total aging	6,600	7,072
International Consumer and Network Services [Member] | Card Member Loans [Member]
Accounts Receivables [Line Items]
Past Due	33	34
International Consumer and Network Services [Member] | Card Member Loans [Member] | Financing Receivables 60 To 89 Days Past Due [Member]
Accounts Receivables [Line Items]
Past Due	23	25
International Consumer and Network Services [Member] | Card Member Loans [Member] | Financing Receivables Equal To Greater Than 90 Days Past Due [Member]
Accounts Receivables [Line Items]
Past Due	53	52
International Consumer and Network Services [Member] | Card Member Receivables [Member] | Financing Receivables Period Past Due [Domain]
Accounts Receivables [Line Items]
Current	5,503	5,515
Total aging	5,582	5,599
International Consumer and Network Services [Member] | Card Member Receivables [Member]
Accounts Receivables [Line Items]
Past Due	24	24
International Consumer and Network Services [Member] | Card Member Receivables [Member] | Financing Receivables 60 To 89 Days Past Due [Member]
Accounts Receivables [Line Items]
Past Due	15	18
International Consumer and Network Services [Member] | Card Member Receivables [Member] | Financing Receivables Equal To Greater Than 90 Days Past Due [Member]
Accounts Receivables [Line Items]
Past Due	40	42
Global Small Business Services [Member] | Card Member Loans [Member] | Financing Receivables Period Past Due [Domain]
Accounts Receivables [Line Items]
Current	8,547	7,867
Total aging	8,644	7,951
Global Small Business Services [Member] | Card Member Loans [Member]
Accounts Receivables [Line Items]
Past Due	27	26
Global Small Business Services [Member] | Card Member Loans [Member] | Financing Receivables 60 To 89 Days Past Due [Member]
Accounts Receivables [Line Items]
Past Due	20	18
Global Small Business Services [Member] | Card Member Loans [Member] | Financing Receivables Equal To Greater Than 90 Days Past Due [Member]
Accounts Receivables [Line Items]
Past Due	50	40
Global Small Business Services [Member] | Card Member Receivables [Member] | Financing Receivables Period Past Due [Domain]
Accounts Receivables [Line Items]
Current	13,516	12,734
Total aging	13,706	12,950
Global Small Business Services [Member] | Card Member Receivables [Member]
Accounts Receivables [Line Items]
Past Due	64	69
Global Small Business Services [Member] | Card Member Receivables [Member] | Financing Receivables 60 To 89 Days Past Due [Member]
Accounts Receivables [Line Items]
Past Due	39	45
Global Small Business Services [Member] | Card Member Receivables [Member] | Financing Receivables Equal To Greater Than 90 Days Past Due [Member]
Accounts Receivables [Line Items]
Past Due	87	102
Global Corporate Payments [Member] | Card Member Loans [Member] | Financing Receivables Period Past Due [Domain]
Accounts Receivables [Line Items]
Total aging	49	55
Global Corporate Payments [Member] | Card Member Loans [Member] | Financing Receivables Equal To Greater Than 90 Days Past Due [Member]
Accounts Receivables [Line Items]
Past Due	1	1
Global Corporate Payments [Member] | Card Member Receivables [Member] | Financing Receivables Period Past Due [Domain]
Accounts Receivables [Line Items]
Total aging	15,348	13,777
Global Corporate Payments [Member] | Card Member Receivables [Member] | Financing Receivables Equal To Greater Than 90 Days Past Due [Member]
Accounts Receivables [Line Items]
Past Due	$ 111	$ 124