Leases Supplemental Income Statement Information (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)
Operating lease [Member]
Lessee, Lease, Description [Line Items]
Operating leases	$ 43.3
Short-term leases	49.7
Variable leases	19.1
Sublease income	(2.6)
Total operating lease cost	109.5
Finance lease [Member]
Lessee, Lease, Description [Line Items]
Amortization of right-of-use assets	15.3
Interest on lease liabilities	1.5
Total finance lease cost	$ 16.8