Financial Instruments - Derivatives and Hedging (Details) - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 01, 2021	Dec. 31, 2020	Dec. 31, 2019
Derivative Instruments, Gain (Loss)
Gain (loss) to be reclassified during next 12 months	$ 18,800,000		$ 18,800,000
Commodities Investment
Derivative Instruments, Gain (Loss)
Derivative liability, current			1,200,000
Derivative asset, current	1,100,000
Domestic Line of Credit | USD Term Loan
Derivative Instruments, Gain (Loss)
Debt face amount	$ 1,150,000,000			$ 750,000,000
Domestic Line of Credit | Notes maturing 2026 Add-On
Derivative Instruments, Gain (Loss)
Debt face amount		$ 400,000,000
Interest rate swaps | Domestic Line of Credit | USD Term Loan
Derivative Instruments, Gain (Loss)
Interest rate swap rate (as a percent)	2.10%
Foreign Exchange Forward
Derivative Instruments, Gain (Loss)
Derivative notional amount	$ 58,700,000		25,000,000
Derivative remaining maturity	1 year
Not Designated as Hedging Instrument | Foreign Exchange Forward
Derivative Instruments, Gain (Loss)
Derivative notional amount	$ 26,600,000		78,500,000
Derivative remaining maturity	1 year
Derivative liability, current	$ 100,000		$ 500,000