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Leases (Balance Sheet Information, Leases) (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Mar. 31, 2020
--- | --- | ---
Operating Leases |  |
Operating leases, right-of-use assets | $ 128.7 | $ 136.9
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] | us-gaap:OtherAssetsNoncurrent |
Operating leases, lease liabilities (current) | $ 39.9 | 35.3
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] | us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent |
Operating leases, lease liabilities (non-current) | $ 122.8 | 129.6
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] | us-gaap:OtherLiabilitiesNoncurrent |
Operating leases, lease liabilities | $ 162.7 | 164.9
Finance Leases |  |
Finance leases, right-of-use assets | $ 0.8 | 46.4
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] | lgfa:PropertyPlantandEquipmentandFinanceLeaseRightofUseAssetafterAccumulatedDepreciationandAmortization |
Finance leases, lease liabilities (current) | $ 0.4 | 3.0
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List] | us-gaap:LongTermDebtAndCapitalLeaseObligationsCurrent |
Finance leases, lease liabilities (non-current) | $ 0.0 | 39.4
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] | us-gaap:LongTermDebtAndCapitalLeaseObligations |
Finance lease, lease liabilities | $ 0.4 | $ 42.4
Operating leases, weighted average remaining lease term | 5 years 4 months 24 days | 6 years 1 month 6 days
Finance leases, weighted average remaining lease term | 2 months 12 days | 21 years 7 months 6 days
Operating leases, weighted average discount rate, percent | 3.90% | 4.10%
Finance leases, weighted average discount rate, percent | 7.00% | 6.40%

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- Definition Present value of lessee's discounted obligation for lease payments from finance lease. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980 Reference 2: 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=121603541&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=121603541&loc=SL77918627-209977 + Details
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