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LEASES - ADDITIONAL INFORMATION (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Mar. 31, 2020 USD ($) extension lease | Mar. 31, 2020 USD ($) extension lease
Lessee, Lease, Description [Line Items] |  |
ROU asset obtained in exchange for operating lease liability | $ 12.4 | $ 45.7
ROU asset obtained in exchange for finance lease liability | $ 34.0 | $ 49.7
Weighted average remaining lease term, operating lease | 27 years 4 months 24 days | 27 years 4 months 24 days
Weighted average remaining lease term, finance lease | 2 years 7 months 17 days | 2 years 7 months 17 days
Operating lease, discount rate | 3.18% | 3.18%
Finance lease, discount rate | 2.56% | 2.56%
Number of leases not yet commenced | lease | 3 | 3
Lease not yet commenced, estimated payments | $ 5.7 | $ 5.7
Number of options to extend | extension | 2 | 2
Renewal term | 5 years | 5 years
Solar Property | Minimum |  |
Lessee, Lease, Description [Line Items] |  |
Term of contract | 15 years | 15 years
Renewal term | 5 years | 5 years
Solar Property | Maximum |  |
Lessee, Lease, Description [Line Items] |  |
Term of contract | 25 years | 25 years
Renewal term | 10 years | 10 years
Office Building | Minimum |  |
Lessee, Lease, Description [Line Items] |  |
Term of contract | 1 year | 1 year
Office Building | Maximum |  |
Lessee, Lease, Description [Line Items] |  |
Term of contract | 25 years | 25 years
Meter License |  |
Lessee, Lease, Description [Line Items] |  |
Term of contract | 7 years | 7 years
Equipment |  |
Lessee, Lease, Description [Line Items] |  |
Term of contract | 5 years | 5 years
Storage and Capacity |  |
Lessee, Lease, Description [Line Items] |  |
Term of contract | 50 years | 50 years

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- Definition Lessee, Operating Lease, Lease Not yet Commenced, Estimated Payments + References No definition available. + Details
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- Definition Lessee, Operating Lease, Lease Not yet Commenced, Number of Options to Extend + References No definition available. + Details
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- Definition Weighted average remaining lease term for finance lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (g)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 + Details
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- Definition Discount rate used by lessee to determine present value of finance lease payments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Discount rate used by lessee to determine present value of operating lease payments. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
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- Definition Term of lessee's operating lease renewal for lease not yet commenced, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980 + Details
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