Consolidated Comprehensive Income Statements (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net Income	$ 536.8	$ 477.1	$ 1,086.4	$ 963.8
Other Comprehensive Income (Loss), net of tax
Translation adjustments, net of tax	(58.8)	(144.6)	(18.2)	271.1
Net gain (loss) on derivatives, net of tax	(39.4)	(5.2)	(39.9)	8.6
Reclassification adjustments:
Derivatives, net of tax	26.0	36.0	44.7	34.7
Pension and postretirement benefits, net of tax	15.9	18.3	31.9	36.6
Total Other Comprehensive Income (Loss)	(56.3)	(95.5)	18.5	351.0
Comprehensive Income	480.5	381.6	1,104.9	1,314.8
Net Income (Loss) Attributable to Noncontrolling Interest	6.3	4.0	(4.5)	8.7
Other Comprehensive Income (Loss) Attributable to Noncontrolling Interest	(3.0)	15.6	8.2	35.3
Comprehensive Income Attributable to Air Products	$ 477.2	$ 362.0	$ 1,101.2	$ 1,270.8