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v3.19.1

Quarterly Data (unaudited) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2016
Quarterly Financial Data [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 1,273.1 | $ 1,440.9 | $ 2,812.0 | $ 2,125.2 | $ 1,113.9 | $ 1,153.5 | $ 2,173.8 | $ 1,679.5 | $ 7,651.2 | $ 6,120.7 | $ 5,685.7
Operating income (loss) | 49.2 | 29.5 | 591.0 | 395.0 | 27.5 | (1.0) | 515.3 | 468.2 | 1,064.7 | 1,010.0 | 992.4
Net income (loss) including noncontrolling interests | (7.8) | (11.7) | 407.7 | 434.2 | (16.7) | (62.2) | 311.8 | 290.9 | 822.4 | 523.8 | 488.8
Net income (loss) attributable to UGI Corporation | $ 24.4 | $ 52.4 | $ 276.0 | $ 365.9 | $ 5.0 | $ (19.0) | $ 219.9 | $ 230.7 | $ 718.7 | $ 436.6 | $ 364.7
Earnings (loss) per common share attributable to UGI Corporation stockholders: |  |  |  |  |  |  |  |  |  |  |
Basic (in dollars per share) | $ 0.14 | $ 0.30 | $ 1.59 | $ 2.11 | $ 0.03 | $ (0.11) | $ 1.27 | $ 1.33 | $ 4.13 | $ 2.51 | $ 2.11
Diluted (in dollars per share) | $ 0.14 | $ 0.30 | $ 1.57 | $ 2.07 | $ 0.03 | $ (0.11) | $ 1.24 | $ 1.30 | $ 4.06 | $ 2.46 | $ 2.08
Basic (in shares) | 174,391 | 173,991 | 173,570 | 173,670 | 173,769 | 173,742 | 173,624 | 173,512 | 173,908 | 173,662 | 173,154
Diluted (in shares) | 177,506 | 176,807 | 176,350 | 176,948 | 177,175 | 173,742 | 177,136 | 176,984 | 176,905 | 177,159 | 175,572
Effect of Fourth Quarter Events [Line Items] |  |  |  |  |  |  |  |  |  |  |
Tax Cuts And Jobs Act Of 2017, increase (decrease) in net income | $ (5.8) | $ 0.8 | $ 5.3 | $ 166.0 |  |  |  |  |  |  |
2017 French Finance Bills, increase (decrease) in net income | $ (1.4) | (0.1) | $ (3.7) | $ 17.3 |  |  |  |  |  |  |
Beneficial impact of adjustment to income tax liabilities |  |  |  |  |  |  |  |  | $ 52.1 | $ (0.6) |
Impairment of intangible assets, finite-lived |  | 75.0 |  |  |  |  |  |  | 75.0 | 0.0 | $ 0.0
Loss on extinguishments of debt |  |  |  |  |  | $ 0.7 | $ 3.6 | $ 5.3 | 0.0 | $ 59.7 | $ 48.9
Trademarks and Trade Names |  |  |  |  |  |  |  |  |  |  |
Effect of Fourth Quarter Events [Line Items] |  |  |  |  |  |  |  |  |  |  |
Impairment of intangible assets, finite-lived |  | $ 14.5 |  |  |  |  |  |  |  |  |
French Parliament |  |  |  |  |  |  |  |  |  |  |
Effect of Fourth Quarter Events [Line Items] |  |  |  |  |  |  |  |  |  |  |
Beneficial impact of adjustment to income tax liabilities |  |  |  |  | $ 1.6 |  |  | $ 27.4 | $ 29.0 |  |

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