Summary of Significant Accounting Policies (Details)	Dec. 31, 2020 USD ($)	Dec. 31, 2020 EUR (€)	Dec. 14, 2020	Nov. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)
4.875% Euro Fixed Rate Notes due 2022
Debt Instrument [Line Items]
Stated rate	4.875%	4.875%	4.875%
Senior Notes | 7.875% Senior Secured Notes Due 2029
Debt Instrument [Line Items]
Principal amount	$ 500,000,000			$ 500,000,000	$ 0
Stated rate	7.875%	7.875%		7.875%
Senior Notes | 4.875% Euro Fixed Rate Notes due 2022
Debt Instrument [Line Items]
Principal amount	$ 0	€ 415,000,000			$ 465,000,000
Stated rate	4.875%	4.875%