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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (unaudited) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Mar. 31, 2025
Mar. 31, 2024
Statement of Comprehensive Income [Abstract]        
Net income attributable to UGI Corporation $ 479 $ 496 $ 854 $ 590
Other comprehensive income (loss):        
Net gains (losses) on derivative instruments (net of tax of $2, $(5), $(3) and $2, respectively) (4) 12 11 (3)
Reclassifications of net (gains) losses on derivative instruments (net of tax of $0, $5, $0 and $8, respectively) 1 (9) (1) (19)
Foreign currency adjustments (net of tax of $11, $(7), $(9) and $5, respectively) 47 (24) (25) 25
Benefit plans (net of tax of $0, $0, $0 and $0, respectively) 1 (1) 0 (1)
Other comprehensive income (loss) 45 (22) (15) 2
Comprehensive income attributable to UGI Corporation $ 524 $ 474 $ 839 $ 592