XML 35 R166.htm IDEA: XBRL DOCUMENT v2.4.0.6
Quarterly Financial Data (Details Textuals) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Quarterly Financial Data (Textuals) [Abstract]                      
Membership rewards expense $ 342                    
Membership rewards expense, after-tax 212                    
Earnings allocated to participating share awards and other items 7 14 14 14 14 15 15 14 49 58 51
Restructuring Reserve By Type Of Restructuring [Line Items]                      
Restructuring charges, gross of revision adjustments 400                    
Restructuring charges, after-tax 287                    
Statement [Line Items]                      
Cardmember reimbursements 153                    
Cardmember reimbursements, after-tax 95                    
Periods in the current year [Member]
                     
Statement [Line Items]                      
Cardmember reimbursements 49                    
Periods prior to the current year [Member]
                     
Statement [Line Items]                      
Cardmember reimbursements $ 83