Consolidated Comprehensive Income Statements (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023
Statement of Comprehensive Income [Abstract]
Net Income	$ 580.9	$ 449.9	$ 1,202.5	$ 1,033.7
Other Comprehensive (Loss) Income, net of tax:
Translation adjustments, net of tax	(223.8)	51.0	156.8	560.6
Net gain (loss) on derivatives, net of tax	82.3	(14.6)	(78.8)	106.4
Pension and postretirements benefits, net of tax			0.0	6.7
Reclassification adjustments:
Currency translation adjustment	0.0	(0.3)	0.0	(0.3)
Derivatives, net of tax	34.8	5.8	(7.4)	(62.9)
Pension and postretirement benefits, net of tax	13.6	14.4	27.3	26.3
Other Comprehensive Income (Loss), Net of Tax, Total	(93.1)	56.3	97.9	636.8
Comprehensive Income	487.8	506.2	1,300.4	1,670.5
Net Income Attributable to Noncontrolling Interests	8.5	10.1	20.8	21.7
Other Comprehensive Income (Loss) Attributable to Noncontrolling Interests	62.5	1.3	(75.6)	14.0
Comprehensive Income Attributable to Air Products	$ 416.8	$ 494.8	$ 1,355.2	$ 1,634.8