Quarterly report pursuant to Section 13 or 15(d)

Leases - Schedule of Supplemental Balance Sheet Information (Details)

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Leases - Schedule of Supplemental Balance Sheet Information (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Sep. 30, 2019
Leases [Abstract]    
Operating lease right-of-use assets $ 172.5 $ 0.0
Other current liabilities 32.9  
Operating lease liabilities 137.1 $ 0.0
Total operating lease liabilities $ 170.0  
Weighted-average remaining lease term (in years) 7 years 10 months 24 days  
Weighted-average discount rate 2.20%