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Leases (Tables)
 12 Months Ended
Dec. 31, 2021
Leases [Abstract]  
Lease, Cost [Table Text Block]
The following table details the components of lease cost:
Years Ended December 31,
(in millions)202120202019
Operating lease cost (1)
$9.9 $9.9 $9.8 
Finance lease cost:
Amortization of right-of-use assets2.3 2.1 2.2 
Interest on lease liabilities0.4 0.5 0.2 
Sublease income(3.0)(3.0)(2.9)
Total lease cost$9.6 $9.5 $9.3 
(1) Includes short-term and variable lease costs, which were immaterial.
Schedule of Lease Assets and Liabilities [Table Text Block]
The following table presents supplemental balance sheet information related to finance leases:
(in millions)Balance Sheet LineDecember 31, 2021December 31, 2020
Finance lease right-of-use assetsProperty, plant, and equipment, net$8.1 $10.2 
Current finance lease liabilitiesOther accrued expenses$2.7 $2.6 
Long-term finance lease liabilitiesOther liabilities3.6 5.5 
Total finance lease liabilities$6.3 $8.1 
Schedule of Lease Payments [Table Text Block]
The following table presents supplemental cash flow information related to leases:
Years Ended December 31,
(in millions)202120202019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases$10.2 $9.6 $10.4 
Operating cash flows from finance leases0.4 0.5 0.6 
Financing cash flows from finance leases2.3 2.0 1.7 
Lease liabilities arising from obtaining right-of-use assets:
Operating leases$6.5 $2.2 $2.6 
Finance leases0.3 0.1 0.3 
Finance Lease, Liability, Maturity [Table Text Block]
The following table details weighted-average remaining lease terms and discount rates:
December 31, 2021December 31, 2020
Weighted-average remaining lease term (in years):
Operating leases3.13.7
Finance leases3.14.1
Weighted-average discount rate:
Operating leases3.8 %4.2 %
Finance leases5.4 %5.5 %
Schedule of Maturities of Lease liabilities [Table Text Block]
The following table details maturities of lease liabilities as of December 31, 2021:
(in millions)Operating LeasesFinance Leases
2022$12.1 $2.7 
20238.5 2.7 
20243.9 1.4 
20252.0 — 
20260.7 — 
2027 and thereafter0.2 — 
Total lease payments27.4 6.8 
Less interest(1.3)(0.5)
Present value of lease liabilities$26.1 $6.3