Debt - Revolving Credit Facilities (Details)	Mar. 31, 2020 USD ($)
Line of Credit Facility [Line Items]
Senior Secured Domestic Revolving Credit Facility	$ 1,680,300,000
Total Outstanding	256,600,000
Total Available	1,405,800,000
Standby letters of credit issued	17,900,000
Senior Secured Domestic Revolving Credit Facility
Line of Credit Facility [Line Items]
Senior Secured Domestic Revolving Credit Facility	1,450,000,000.0
Total Outstanding	170,000,000.0
Total Available	1,262,100,000
Senior Secured International Revolving Credit Facility
Line of Credit Facility [Line Items]
Senior Secured Domestic Revolving Credit Facility	174,600,000
Total Outstanding	73,000,000.0
Total Available	101,600,000
Other International Facilities
Line of Credit Facility [Line Items]
Senior Secured Domestic Revolving Credit Facility	55,700,000
Total Outstanding	13,600,000
Total Available	$ 42,100,000