Debt and Credit Facilities - Senior Secured Notes (Details) - USD ($)				3 Months Ended		9 Months Ended
	Oct. 15, 2021	Sep. 30, 2021	Sep. 29, 2021	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020
Debt Instrument [Line Items]
Repurchase of debt						$ 522,600,000	$ 2,800,000
Loss on debt redemption and refinancing cost				$ 14,700,000	$ 0	14,700,000	$ 0
Long-term debt, less current portion		$ 3,315,400,000		3,315,400,000		3,315,400,000		$ 3,731,400,000
Term Loan A due July 2023
Debt Instrument [Line Items]
Principal satisfied and discharged		177,200,000
Accrued interest		$ 200,000		$ 200,000		$ 200,000
Senior Secured Notes due October 2026
Debt Instrument [Line Items]
Debt instrument aggregate principal			$ 600,000,000
Debt interest rate		1.573%	1.573%	1.573%		1.573%
Redemption price, percentage			100.00%
Debt issuance costs capitalized		$ 5,400,000		$ 5,400,000		$ 5,400,000
Senior Notes due December 2022
Debt Instrument [Line Items]
Debt interest rate		4.875%		4.875%		4.875%
Repurchase of debt		$ 358,100,000
Principal satisfied and discharged		339,300,000
Debt premium		13,300,000		$ 13,300,000		$ 13,300,000
Accrued interest		5,500,000		5,500,000		5,500,000
Loss on debt redemption and refinancing cost				14,700,000
Long-term debt, less current portion		$ 85,700,000		$ 85,700,000		$ 85,700,000
Senior Notes due December 2022 | Subsequent Event
Debt Instrument [Line Items]
Principal satisfied and discharged	$ 85,700,000