Leases and Commitments - Other Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating Cash Flows From Operating Leases	$ 63.7	$ 64.2
Operating Cash Flows From Finance Leases	0.3	0.3
Financing Cash Flows From Finance Leases	1.3	1.2
Cash Paid For Amounts Included In Measurement of Liabilities	65.3	65.7
Right-of-use Assets Obtained In Exchange For New Finance Liabilities	0.9	1.0
Right-of-use Assets Obtained In Exchange For New Operating Liabilities	$ 24.9	$ 45.4