Leases Lease cost (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019 USD ($)
Leases [Abstract]
Finance Lease, Right-of-Use Asset, Amortization	$ 0.7
Finance Lease, Interest Expense	0.3
Operating Lease, Cost, Variable Leases	60.0
Lease, Cost, Excluding Sublease Income	$ 61.0