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Commitments And Contingencies, And Derivative Financial Instruments (Narrative) (Details) - USD ($)
$ in Millions
Jul. 28, 2015
Sep. 30, 2016
Loss Contingencies [Line Items]    
Net aggregate future lease payments   $ 794,068.0
Lease Term 10 years  
Letters of credit outstanding   256.0
Standby Letters of Credit    
Loss Contingencies [Line Items]    
Letters of credit outstanding   256.0
Separate, Committed and Uncommitted Letter-of-Credit Facilities    
Loss Contingencies [Line Items]    
Line of credit facility, amount outstanding   253.5
Revolving Credit Facility, One Billion Six Hundred Million | Letter of Credit    
Loss Contingencies [Line Items]    
Line of credit facility, amount outstanding   $ 2.5