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Impairments - Fair Value Measurements Table (Detail) (Fair Value, Inputs, Level 3 [Member], Income Approach Valuation Technique [Member], Nonrecurring [Member], USD $)
In Millions, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Fair Value, Inputs, Level 3 [Member] | Income Approach Valuation Technique [Member] | Nonrecurring [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Long-lived assets held for use $ 548 $ 103
Cost-method investment (1) $ 32 [1] $ 34 [1]
[1] This represents the Company’s after-tax net investment.