Consolidated Comprehensive Income Statements (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Statement of Comprehensive Income [Abstract]
Net Income	$ 708.9	$ 610.5	$ 1,911.4	$ 1,644.2
Other Comprehensive Loss, net of tax:
Translation adjustments, net of tax	(140.2)	(175.8)	16.6	384.8
Net gain (loss) on derivatives, net of tax	13.5	40.8	(65.3)	147.2
Pension and postretirements benefits, net of tax			0.0	6.7
Reclassification adjustments:
Currency translation adjustment			0.0	(0.3)
Derivatives, net of tax	15.5	(24.4)	8.1	(87.3)
Pension and postretirement benefits, net of tax	13.8	13.5	41.1	39.8
Net current period other comprehensive income (loss)	(97.4)	(145.9)	0.5	490.9
Comprehensive Income	611.5	464.6	1,911.9	2,135.1
Net Income Attributable to Noncontrolling Interests	12.3	14.9	33.1	36.6
Amount attributable to noncontrolling interests	17.8	(4.4)	(57.8)	9.6
Comprehensive Income Attributable to Air Products	$ 581.4	$ 454.1	$ 1,936.6	$ 2,088.9