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Series Preferred Stock	12 Months Ended
Series Preferred Stock	Sep. 30, 2017
Equity [Abstract]
Series Preferred Stock	Note 12 — Series Preferred Stock UGI has 10,000,000 shares of UGI Series Preferred Stock authorized for issuance, including both series subject to and series not subject to mandatory redemption. We had no shares of UGI Series Preferred Stock outstanding at September 30, 2017 or 2016. UGI Utilities has 2,000,000 shares of UGI Utilities Series Preferred Stock authorized for issuance, including both series subject to and series not subject to mandatory redemption. At September 30, 2017 and 2016, there were no shares of UGI Utilities Series Preferred Stock outstanding.