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INCOME TAXES (Tables) | 3 Months Ended
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Dec. 31, 2017
Income Tax Disclosure [Abstract] |
Summary of Impact of Tax Cuts and Jobs Act | The amounts recorded, which had no impact on cash flows for the quarter ended December 31, 2017, are presented in the table below.
| Spire |  | Spire Missouri |  | Spire Alabama
Adjustment to deferred tax assets | $ | — |  |  | $ | — |  |  | $ | (60.8 | )
Adjustment to deferred tax liabilities | (296.6 | ) |  | (264.1 | ) |  | — |
Adjustment to deferred income tax expense | (59.9 | ) |  | (43.9 | ) |  | 59.2 |
Adjustment to regulatory assets | (59.4 | ) |  | (61.0 | ) |  | 1.6 |
Adjustment to regulatory liabilities | 177.3 |  |  | 159.2 |  |  | — |

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- Definition Tabular disclosure of the components of net deferred tax asset or liability recognized in an entity's statement of financial position, including the following: the total of all deferred tax liabilities, the total of all deferred tax assets, the total valuation allowance recognized for deferred tax assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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