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Leases (Tables)
 12 Months Ended
Dec. 31, 2020
Leases [Abstract]  
Lease Cost Income statement presentation for these costs (when ultimately recognized on the income statement) is also included:
Year Ended December 31, (in millions)
Income Statement Classification20202019
Finance lease cost
Amortization of right-of-use assetsDepreciation and amortization$23.4 $15.5 
Interest on lease liabilitiesInterest expense, net11.1 11.3 
Total finance lease cost34.5 26.8 
Operating lease costOperation and maintenance20.3 17.9 
Short-term lease costOperation and maintenance— 1.0 
Total lease cost$54.8 $45.7 
Right-of-Use Assets and Liabilities
Our right-of-use assets and liabilities are presented in the following lines on the Consolidated Balance Sheets:
At December 31, (in millions)
Balance Sheet Classification20202019
Assets
Finance leasesNet Property, Plant and Equipment$176.8 $179.5 
Operating leasesDeferred charges and other39.9 64.2
Total leased assets216.7 243.7
Liabilities
Current
Finance leasesCurrent portion of long-term debt23.3 13.4
Operating leasesOther accruals10.3 13.2
Noncurrent
Finance leasesLong-term debt, excluding amounts due within one year171.7 188.1
Operating leasesOther noncurrent liabilities29.9 51.6
Total lease liabilities$235.2 $266.3 
Lease Information
Other pertinent information related to leases was as follows:
Year Ended December 31, (in millions)
20202019
Cash paid for amounts included in the measurement of lease liabilities
Operating cash flows used for finance leases$11.1 $11.3 
Operating cash flows used for operating leases20.2 17.9
Financing cash flows used for finance leases18.4 10.6
Right-of-use assets obtained in exchange for lease obligations
Finance leases59.3 26.4
Operating leases$10.9 $13.4 
December 31, 2020December 31, 2019
Weighted-average remaining lease term (years)
Finance leases11.214.8
Operating leases8.09.2
Weighted-average discount rate
Finance leases5.1 %5.9 %
Operating leases4.0 %4.3 %
Lease Maturity
Maturities of our lease liabilities as of December 31, 2020 were as follows:
As of December 31, 2020, (in millions)
TotalFinance LeasesOperating Leases
2021$44.4 $32.7 $11.7 
202237.4 32.2 5.2 
202333.5 28.8 4.7 
202425.3 20.8 4.5 
202519.8 16.1 3.7 
Thereafter152.3 134.1 18.2 
Total lease payments312.7 264.7 48.0 
Less: Imputed interest(77.5)(69.7)(7.8)
Total
235.2 195.0 40.2 
Reported as of December 31, 2020
Short-term lease liabilities33.6 23.3 10.3 
Long-term lease liabilities201.6 171.7 29.9 
Total lease liabilities$235.2 $195.0 $40.2