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Debt, including Finance Lease Obligations - Schedule of Long-term Debt (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Oct. 28, 2020	Jan. 24, 2018
Line of Credit Facility
Total debt including finance lease obligations	$ 1,280.5	$ 1,306.5
Less: debt issuance costs	10.9	13.1
Total debt including finance lease obligations, net of debt issuance costs	1,269.6	1,293.4
Less: debt maturing within one year	19.6	26.0
Long-term debt including finance lease obligations	1,250.0	1,267.4
Revolving Credit Facility and other lines of credit
Line of Credit Facility
Total debt including finance lease obligations	0.0	1.8
Letters of credit outstanding	2.5	2.3
Available under the facility	497.5	497.7
Term Loan
Line of Credit Facility
Total debt including finance lease obligations	$ 328.1	351.6
Senior Notes \| 3.88% Senior Note due 2028
Line of Credit Facility
Stated rate	3.88%		3.875%
Total debt including finance lease obligations	$ 550.0	550.0
Senior Notes \| 4.50% Senior Note due 2026
Line of Credit Facility
Stated rate	4.50%			4.50%
Total debt including finance lease obligations	$ 300.0	300.0
Finance Lease Obligations
Line of Credit Facility
Total debt including finance lease obligations	$ 102.4	$ 103.1