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Debt Debt, Revolving Credit Facility (Details) - Revolving Credit Facility
May 02, 2017
USD ($)
Debt Instrument [Line Items]  
Maximum borrowing capacity $ 1,500,000,000
Potential maximum borrowing capacity $ 2,250,000,000
Commitment fee percentage 0.15%
Federal Funds Rate  
Debt Instrument [Line Items]  
Basis spread on variable rate 0.50%
Eurocurrency Rate  
Debt Instrument [Line Items]  
Basis spread on variable rate 1.00%