Details of Selected Consolidated Balance Sheet Captions - Deferred Credits and Other Liabilities Detail Table (Details) - USD ($) $ in Thousands |
Sep. 30, 2020 |
Sep. 30, 2019 |
Sep. 30, 2018 |
Sep. 30, 2017 |
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Balance Sheet Related Disclosures [Abstract] | ||||
Pension and post retirement liabilities | $ 337,303 | $ 279,083 | ||
Operating leases | 201,071 | |||
Customer advances for construction | 10,060 | 12,566 | ||
Other regulatory liabilities | 17,838 | 16,120 | ||
Asset retirement obligation | 20,348 | 17,054 | ||
Liabilities from risk management activities | 0 | 1,249 | ||
APT annual adjustment mechanism | 13,486 | 25,545 | ||
Unrecognized Tax Benefits | 30,921 | 27,716 | $ 26,203 | $ 23,719 |
Other | 11,101 | 20,883 | ||
Total | $ 642,128 | $ 400,216 |
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- Definition Aggregate carrying amount, as of the balance sheet date, of noncurrent obligations not separately disclosed in the balance sheet due to materiality considerations. Noncurrent liabilities are expected to be paid after one year (or the normal operating cycle, if longer). No definition available.
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- Definition Rate action of a regulator resulting in capitalization or accrual of over-recovered regulatory clause revenue. This is the long-term portion of the liability. No definition available.
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- Definition Noncurrent portion of the carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- References No definition available.
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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as noncurrent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled after one year or the normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Amount of liabilities classified as other, due after one year or the normal operating cycle, if longer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of liability, recognized in statement of financial position, for pension, other postretirement and postemployment benefits. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The amount for the individual regulatory noncurrent liability as itemized in a table of regulatory noncurrent liabilities as of the end of the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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