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Debt and Other Obligations - Term Loan (Details) € in Millions	1 Months Ended	9 Months Ended	12 Months Ended	92 Months Ended
	Sep. 30, 2021 USD ($)	Sep. 30, 2021 USD ($)	Dec. 31, 2014 USD ($)	Aug. 30, 2021	Sep. 30, 2021 EUR (€)	Dec. 31, 2014 EUR (€)
Cross Currency Interest Rate Contract | Cash Flow Hedge | Designated as hedging instrument
Line of Credit Facility [Line Items]
Notional amount converted into EUR	$ 197,000,000	$ 197,000,000
Term Loan Facility
Line of Credit Facility [Line Items]
Debt face amount			$ 895,000,000
Term Loan Facility | LIBOR
Line of Credit Facility [Line Items]
Increase (decrease) in basis spread on variable rate	0.10%	0.10%			0.10%
Term Loan Facility | LIBOR | Emission Profile Targets Years 2022 Through 2025
Line of Credit Facility [Line Items]
Increase (decrease) in basis spread on variable rate	0.10%	0.10%			0.10%
Term Loan Facility | EURIBOR
Line of Credit Facility [Line Items]
Increase (decrease) in basis spread on variable rate	0.10%	0.10%			0.10%
Term Loan Facility | EURIBOR | Emission Profile Targets Years 2022 Through 2025
Line of Credit Facility [Line Items]
Increase (decrease) in basis spread on variable rate	0.10%	0.10%			0.10%
Term Loan Facility | Minimum | LIBOR | Emission Profile Targets Years 2026 Through 2028
Line of Credit Facility [Line Items]
Increase (decrease) in basis spread on variable rate	0.05%	0.05%			0.05%
Term Loan Facility | Minimum | EURIBOR | Emission Profile Targets Years 2026 Through 2028
Line of Credit Facility [Line Items]
Increase (decrease) in basis spread on variable rate	0.05%	0.05%			0.05%
Term Loan Facility | Maximum | LIBOR | Emission Profile Targets Years 2026 Through 2028
Line of Credit Facility [Line Items]
Increase (decrease) in basis spread on variable rate	0.10%	0.10%			0.10%
Term Loan Facility | Maximum | EURIBOR | Emission Profile Targets Years 2026 Through 2028
Line of Credit Facility [Line Items]
Increase (decrease) in basis spread on variable rate	0.10%	0.10%			0.10%
Term Loan - USD
Line of Credit Facility [Line Items]
Debt face amount	$ 300,000,000	$ 300,000,000	$ 358,000,000
Term Loan - EUR
Line of Credit Facility [Line Items]
Debt face amount | €					€ 300.0	€ 399.0
Term Loan
Line of Credit Facility [Line Items]
Required repayment per annum (at least) (as a percent)	1.00%		1.00%
Debt issuance costs, gross	$ 7,800,000	7,800,000
Debt issuance costs	2,800,000	$ 2,800,000
Finance costs directly expensed	$ 5,000,000
Term Loan | LIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.25%	2.00%		2.00%
Variable rate basis floor	0.50%		1.00%	0.00%
Term Loan | EURIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.50%	2.25%
Variable rate basis floor	0.00%		1.00%
Term Loan | Minimum | LIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate			3.75%
Term Loan | Minimum | EURIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate			3.75%
Term Loan | Maximum | LIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate			4.00%
Term Loan | Maximum | EURIBOR
Line of Credit Facility [Line Items]
Basis spread on variable rate			4.00%

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