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Interest Expense Relating to Debt including Results from Discontinued Operations (Parenthetical) (Detail) (USD $)
In Millions, unless otherwise specified
1 Months Ended 9 Months Ended
Oct. 02, 2012
Jun. 04, 2012
Senior unsecured notes
Jul. 18, 2012
Debt
Oct. 02, 2012
7.55% senior unsecured notes
Debt Instrument [Line Items]        
Debt transferred in Spin-Off $ 10,000 $ 6,000 $ 3,600 $ 400