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Leasing (Tables)
 12 Months Ended
Dec. 31, 2022
Leases [Abstract]  
Components of lease cost [Table Text Block] Lease cost consists of the following:
 Twelve Months Ended
 December 31,
 202220212020
 (in millions)
Finance lease cost
     Amortization of right-of-use assets$9.9 $4.2 $1.8 
Interest on lease liabilities4.7 2.0 0.4 
Total finance lease cost14.6 6.2 2.2 
Operating lease cost32.6 33.3 32.7 
Short-term lease cost1.4 1.6 3.0 
Variable lease cost5.6 3.2 2.9 
Total lease cost$54.2 $44.3 $40.8 
Supplemental lease information [Table Text Block] The following table summarizes additional information related to our lease agreements.
 Twelve Months Ended
 December 31,
 202220212020
 (in millions, except lease term and rate)
Cash paid for amounts included in measurement of lease liabilities
Operating cash flows from finance leases$4.7$2.0$0.3
Operating cash flows from operating leases37.635.935.1
Financing cash flows from finance leases11.25.03.0
Weighted-average remaining lease term - finance leases13.1 years16.4 years15.8 years
Weighted-average remaining lease term - operating leases8.4 years8.6 years8.7 years
Weighted-average discount rate - finance leases4.9 %4.8 %4.2 %
Weighted-average discount rate - operating leases5.4 %5.2 %5.7 %
Future minimum lease payments [Table Text Block] Future undiscounted minimum payments under non-cancelable leases are as follows:
Finance LeasesOperating Leases
(in millions)
2023$17.5 $25.4 
202414.3 20.3 
202511.4 15.5 
202610.0 11.7 
20278.2 10.2 
Thereafter80.2 52.1 
Total future undiscounted minimum lease payments141.6 135.2 
Less: Impact of discounting(36.2)(26.9)
Total$105.4 $108.3 
Right of use assets and lease liabilities [Table Text Block] The right-of-use assets and lease liabilities recorded on our Consolidated Balance Sheets are as follows:
December 31, 2022December 31, 2021
Finance LeasesOperating LeasesFinance LeasesOperating Leases
(in millions)(in millions)
Property, plant and equipment, net$106.2 $— $113.4 $— 
Operating lease right-of-use assets— 107.2 — 123.7 
Total$106.2 $107.2 $113.4 $123.7 
Current portion of operating lease liabilities$— $21.1 $— $24.6 
Accrued expenses and other13.0 — 6.3 — 
Long-term portion of operating lease liabilities— 87.2 — 99.9 
Postretirement benefits and other long-term liabilities92.4 — 82.5 — 
Total$105.4 $108.3 $88.8 $124.5