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Leases (Right-of-Use Assets and Liabilities) (Details) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
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Lessee, Lease, Description [Line Items] |  |
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] | Net Property, Plant and Equipment | Net Property, Plant and Equipment
Finance Lease, Right-of-Use Asset | $ 165.7 | $ 176.8
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] | Deferred charges and other | Deferred charges and other
Operating Lease, Right-of-Use Asset | $ 33.8 | $ 39.9
Total leased assets | $ 199.5 | $ 216.7
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] | Long-term Debt and Lease Obligation, Current | Long-term Debt and Lease Obligation, Current
Finance Lease, Liability, Current | $ 28.1 | $ 23.3
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] | Other Liabilities, Current | Other Liabilities, Current
Operating Lease, Liability, Current | $ 6.7 | $ 10.3
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] | Long-term Debt and Lease Obligation | Long-term Debt and Lease Obligation
Finance Lease, Liability, Noncurrent | $ 157.5 | $ 171.7
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] | Other noncurrent liabilities | Other noncurrent liabilities
Operating Lease, Liability, Noncurrent | $ 27.9 | $ 29.9
Total Lease Liability | $ 220.2 | $ 235.2

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- Definition Total leased assets + References No definition available. + Details
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- Definition Present value of lessee's discounted obligation for lease payments from finance lease, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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- Definition Indicates line item in statement of financial position that includes current finance lease liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918631-209977 + Details
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- Definition Present value of lessee's discounted obligation for lease payments from finance lease, classified as noncurrent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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- Definition Amount, after accumulated amortization, of right-of-use asset from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as current. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123391704&loc=SL77918627-209977 + Details
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