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Subsequent Events Refinancing (Details) - USD ($)
$ in Millions
Dec. 02, 2019
Nov. 03, 2019
Nov. 04, 2018
January 2020 Senior Notes      
Loan Proceeds, Amount Used for Refinancing [Line Items]      
Debt Instrument, Interest Rate, Effective Percentage   2.615% 2.615%
Subsequent Event [Member] | December 2019 Senior Notes      
Loan Proceeds, Amount Used for Refinancing [Line Items]      
Debt Instrument, Interest Rate, Effective Percentage 5.375%    
Loan Proceeds, Amount Used for Refinancing $ 750    
Subsequent Event [Member] | January 2020 Senior Notes      
Loan Proceeds, Amount Used for Refinancing [Line Items]      
Loan Proceeds, Amount Used for Refinancing $ 2,750    
Subsequent Event [Member] | 2.375 January 2020 Note [Member]      
Loan Proceeds, Amount Used for Refinancing [Line Items]      
Debt Instrument, Interest Rate, Effective Percentage 2.375%