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Debt (Commercial Paper) (Details) (Commercial Paper [Member], USD $)
0 Months Ended 0 Months Ended
Sep. 27, 2014
Sep. 27, 2014
Feb. 28, 2014
Feb. 28, 2014
Minimum [Member]
Feb. 28, 2014
Maximum [Member]
Line of Credit Facility [Line Items]          
Maximum borrowing capacity under credit facility     $ 1,000,000,000    
Maturity period of debt 42 days     1 day 397 days
Utilized borrowings under credit facility   $ 569,050,000      
Weighted average interest rate on debt   0.63%