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Debt And Liquidity (2020 Senior Secured Notes) (Details) $ in Millions | 3 Months Ended
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Mar. 31, 2022 USD ($)
Debt Instrument [Line Items] |
Debt Instrument, Event Of Default, Percentage Of Debt Held | 30.00%
2020 Senior Secured Notes |
Debt Instrument [Line Items] |
Debt Instrument, Face Amount | $ 500
Debt Instrument, Interest Rate, Stated Percentage | 4.625%
Debt Instrument, Covenant, Restricted Payments Allowable With No Default Or Event Of Default, Pro Forma Consolidated First Lien Net Leverage Ratio, Maximum | 2.00
Debt Instrument, Covenant, Restricted Payments Allowable Pursuant To Certain Baskets, Pro Forma Consolidated First Lien Net Leverage Ratio, Maximum | 2.00
2020 Senior Secured Notes | Debt Instrument, Redemption, Period One |
Debt Instrument [Line Items] |
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed | 40.00%
Debt Instrument, Redemption Price, Percentage | 104.625%
Debt Instrument, Redemption Price, Premium Applicable, Percentage | 100.00%

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