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Debt (Schedule of Accounts Receivable Securitization Facility) (Details) - USD ($)
$ in Millions
Jul. 06, 2020
Sep. 30, 2020
Dec. 31, 2019
Accounts Receivable Securitization Facility [Member]      
Debt Instrument [Line Items]      
Borrowings outstanding [1]   $ 0 $ 115
Secured Debt [Member] | Accounts Receivable Securitization Facility [Member]      
Debt Instrument [Line Items]      
Repayments of Lines of Credit $ 87    
AmendedRestatedReceivableSecuritizationFacility [Member] | Secured Debt [Member]      
Debt Instrument [Line Items]      
PercentageOfFairValueOfSalesReceivables 100.00%    
[1] The weighted average interest rate was 0.0% and 2.4% as of September 30, 2020 and December 31, 2019, respectively.