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Goodwill and Acquired Intangible Assets - Acquired Intangible Assets (Detail) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Acquired Finite-Lived Intangible Assets [Line Items]    
Intangible assets subject to amortization, Cost Basis $ 391 $ 450
Intangible assets subject to amortization, Accumulated Impairment and Amortization (361) (397)
Intangible assets subject to amortization, Net 30 53
Customer, Services and Lending Relationships [Member]
    
Acquired Finite-Lived Intangible Assets [Line Items]    
Intangible assets subject to amortization, Cost Basis 278 303
Intangible assets subject to amortization, Accumulated Impairment and Amortization (261) (270)
Intangible assets subject to amortization, Net 17 33
Software and Technology [Member]
    
Acquired Finite-Lived Intangible Assets [Line Items]    
Intangible assets subject to amortization, Cost Basis 79 93
Intangible assets subject to amortization, Accumulated Impairment and Amortization (79) (93)
Tradenames and Trademarks [Member]
    
Acquired Finite-Lived Intangible Assets [Line Items]    
Intangible assets subject to amortization, Cost Basis 34 54
Intangible assets subject to amortization, Accumulated Impairment and Amortization (21) (34)
Intangible assets subject to amortization, Net $ 13 $ 20