Consolidated Comprehensive Income Statements (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Statement of Comprehensive Income [Abstract]
Net Income	$ 621.6	$ 583.8
Other Comprehensive Income, net of tax:
Translation adjustments, net of tax	380.6	509.6
Net (loss) gain on derivatives, net of tax	(161.1)	121.0
Pension and postretirements benefits, net of tax	0.0	6.7
Reclassification adjustments:
Derivatives, net of tax	(42.2)	(68.7)
Pension and postretirement benefits, net of tax	13.7	11.9
Total Other Comprehensive Income	191.0	580.5
Comprehensive Income	812.6	1,164.3
Net Income Attributable to Noncontrolling Interests	12.3	11.6
Other Comprehensive (Loss) Income Attributable to Noncontrolling Interests	(138.1)	12.7
Comprehensive Income Attributable to Air Products	$ 938.4	$ 1,140.0