Consolidated Comprehensive Income Statements (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Statement of Comprehensive Income [Abstract]
Net Income	$ 610.5	$ 587.1	$ 1,644.2	$ 1,673.5
Other Comprehensive Loss, net of tax:
Translation adjustments, net of tax	(175.8)	(576.1)	384.8	(594.3)
Net gain (loss) on derivatives, net of tax	40.8	(16.0)	147.2	(55.9)
Pension and postretirements benefits, net of tax			6.7	0.0
Reclassification adjustments:
Currency translation adjustment			(0.3)	0.0
Derivatives, net of tax	(24.4)	11.4	(87.3)	56.1
Pension and postretirement benefits, net of tax	13.5	17.5	39.8	49.4
Total Other Comprehensive Income (Loss)	(145.9)	(563.2)	490.9	(544.7)
Comprehensive Income	464.6	23.9	2,135.1	1,128.8
Net Income Attributable to Noncontrolling Interests	14.9	5.0	36.6	0.5
Other Comprehensive Loss Attributable to Noncontrolling Interests	(4.4)	(18.2)	9.6	(10.0)
Comprehensive Income Attributable to Air Products	$ 454.1	$ 37.1	$ 2,088.9	$ 1,138.3