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Pension Plans, Postretirement and Other Employee Benefits - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
0 Months Ended 6 Months Ended 6 Months Ended
Jan. 02, 2012
retirement_plan
Jun. 30, 2013
United States Pension Plans of US Entity, Defined Benefit [Member]
Jun. 30, 2013
Foreign Pension Plans, Defined Benefit [Member]
Jun. 30, 2013
Pension Plans, Defined Benefit [Member]
Jun. 30, 2013
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Pension Plans, Postretirement and Other Employee Benefits [Line Items]          
Employer contributions   $ 12 $ 15   $ 4
Employer estimated contributions       $ 32 $ 5
Retirement Savings Plan 1        
Defined compensation plan, original employee match percentage on fifty percent of employee contributions 8.00%        
Defined compensation plan, amended employee match percentage on one hundred percent of employee contributions 3.00%        
Defined compensation plan, amended employee match percentage on fifty percent of employee contributions 2.00%