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Employee Benefit Plans - Change in Benefit Obligation, Plan Assets and Funded Status of Defined Benefit Pension Plans (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]    
Fair value of plan assets at end of year $ 517 $ 419
Pension benefits [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Benefit obligation at beginning of year 556 272
Service cost 6 7
Interest cost 27 19
Actuarial loss (gain) 76 (14)
Benefits paid (26) (14)
Participants contributions 1 1
Exchange rate loss (gain) 12 (6)
Acquisitions 11 299
Curtailments (8) (9)
Other   1
Benefit obligation at end of year 655 556
Fair value of plan assets at beginning of year 419 203
Actual return 49 19
Benefits paid (26) (14)
Company contributions 53 19
Participants contributions 1 1
Exchange rate gain (loss) 12 (5)
Acquisitions 9 196
Fair value of plan assets at end of year 517 419
Funded status (138) (137)
Accumulated benefit obligation at end of year 635 527
Postretirement benefits [Member]
    
Defined Benefit Plan Disclosure [Line Items]    
Benefit obligation at beginning of year 35 33
Interest cost 1 1
Actuarial loss (gain) (2) 1
Benefits paid (4) (5)
Acquisitions   5
Benefit obligation at end of year 30 35
Benefits paid (4) (5)
Company contributions 4 5
Funded status $ (30) $ (35)