Financial Instruments - Derivatives and Hedging (Details)	12 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2020 EUR (€)	Dec. 31, 2019 USD ($)
Derivative Instruments, Gain (Loss)
Gain (loss) to be reclassified during next 12 months	$ 17,600,000
Domestic Line of Credit | USD Term Loan
Derivative Instruments, Gain (Loss)
Debt face amount	750,000,000
Foreign exchange forward
Derivative Instruments, Gain (Loss)
Derivative notional amount	$ 25,000,000.0		$ 28,600,000
Derivative remaining maturity	1 year
Interest rate swaps | Medium-term Notes | Euro Notes
Derivative Instruments, Gain (Loss)
Derivative notional amount | €		€ 662,000,000
Interest rate swap rate (as a percent)	2.40%	2.40%
Not Designated as Hedging Instrument | Foreign exchange forward
Derivative Instruments, Gain (Loss)
Derivative notional amount	$ 78,500,000		$ 74,200,000
Derivative remaining maturity	1 year