Debt - Revolving Credit Facilities (Details)	Sep. 30, 2020 USD ($)
Line of Credit Facility [Line Items]
Total Commitments	$ 1,690,200,000
Total Outstanding	129,400,000
Total Available	1,540,100,000
Senior Secured Domestic Revolving Credit Facility
Line of Credit Facility [Line Items]
Total Commitments	1,450,000,000.0
Total Outstanding	20,000,000.0
Total Available	1,409,300,000
Standby letters of credit issued	20,700,000
Senior Secured International Revolving Credit Facility
Line of Credit Facility [Line Items]
Total Commitments	185,500,000
Total Outstanding	93,200,000
Total Available	92,300,000
Other International Facilities
Line of Credit Facility [Line Items]
Total Commitments	54,700,000
Total Outstanding	16,200,000
Total Available	$ 38,500,000