Consolidated Comprehensive Income Statements (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2023	Mar. 31, 2022
Statement of Comprehensive Income [Abstract]
Net Income	$ 449.9	$ 536.8	$ 1,033.7	$ 1,086.4
Other Comprehensive Income (Loss), net of tax:
Translation adjustments, net of tax	51.0	(58.8)	560.6	(18.2)
Net gain (loss) on derivatives, net of tax	(14.6)	(39.4)	106.4	(39.9)
Pension and postretirements benefits, net of tax			6.7	0.0
Reclassification adjustments:
Currency translation adjustment	(0.3)	0.0	(0.3)	0.0
Derivatives, net of tax	5.8	26.0	(62.9)	44.7
Pension and postretirement benefits, net of tax	14.4	15.9	26.3	31.9
Total Other Comprehensive Income (Loss)	56.3	(56.3)	636.8	18.5
Comprehensive Income	506.2	480.5	1,670.5	1,104.9
Net Income Attributable to Noncontrolling Interests	10.1	6.3	21.7	(4.5)
Other Comprehensive Income (Loss) Attributable to Noncontrolling Interests	1.3	(3.0)	14.0	8.2
Comprehensive Income Attributable to Air Products	$ 494.8	$ 477.2	$ 1,634.8	$ 1,101.2