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Other Assets (Details Textuals) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Other Assets [Line Items]      
Prepaid expenses $ 1,998,000,000 $ 1,960,000,000  
Restricted cash 486,000,000 568,000,000  
Amortization period of acquired finite-lived intangible assets 6 years 0 months 0 days 6 years 0 months 0 days  
Other intangible assets, at amortized cost 817,000,000 993,000,000  
Other Assets (Textuals) [Abstract]      
Goodwill impaired 0 0  
Accumulated goodwill impairment losses 0 0  
Amortization expense 193,000,000 198,000,000 189,000,000
Affordable housing partnership interests 541,000,000 427,000,000  
Customer Relationships [Member]
      
Other Assets [Line Items]      
Other intangible assets, at amortized cost 637,000,000 712,000,000  
Other Contracts [Member]
      
Other Assets [Line Items]      
Other intangible assets, at amortized cost 180,000,000 281,000,000  
Minimum [Member]
      
Other Assets [Line Items]      
Amortization period of intangible assets 1 year 0 months 0 days    
Maximum [Member]
      
Other Assets [Line Items]      
Amortization period of intangible assets 22 years 0 months 0 days    
Coupon and Certain Asset-Backed Securitization Maturities [Member]
      
Other Assets [Line Items]      
Restricted cash 58,000,000 76,000,000  
Airline [Member] | Customer Relationships [Member]
      
Other Assets [Line Items]      
Other intangible assets, at amortized cost 290,000,000 358,000,000  
Airline [Member] | Delta [Member] | Customer Relationships [Member]
      
Other Assets [Line Items]      
Other intangible assets, at amortized cost 117,000,000 156,000,000  
Prepaid Miles And Reward Points [Member] | Airline [Member]
      
Other Assets [Line Items]      
Prepaid expenses 1,500,000,000 1,400,000,000  
Prepaid Miles And Reward Points [Member] | Airline [Member] | Delta [Member]
      
Other Assets [Line Items]      
Prepaid expenses $ 900,000,000 $ 1,100,000,000