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Subsequent Events Subsequent Events (Details) - Subsequent Event [Member] - USD ($)
Apr. 15, 2020
Apr. 07, 2020
Ten Point Zero Percent First Lien Notes [Member] [Domain]    
Subsequent Event [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage   10.00%
Debt Instrument, Redemption Price, Percentage   100.00%
Ten Point Zero Percent First Lien Notes [Member] [Domain] | Option A [Member]    
Subsequent Event [Line Items]    
Debt Instrument, Repurchase Percentage   101.00%
Ten Point Zero Percent First Lien Notes [Member] [Domain] | Option B [Member]    
Subsequent Event [Line Items]    
Debt Instrument, Repurchase Percentage   100.00%
4.88% Senior Notes    
Subsequent Event [Line Items]    
Exchange of Debt, Amount   $ 495,000,000.0
Debt Instrument, Face Amount   1,000
Repayments of Debt $ 119,800,000  
4.88% Senior Notes | Ten Point Zero Percent First Lien Notes [Member] [Domain]    
Subsequent Event [Line Items]    
Debt Conversion, Converted Instrument, Amount   $ 1,000
Maximum | Ten Point Zero Percent First Lien Notes [Member] [Domain]    
Subsequent Event [Line Items]    
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed   40.00%