Consolidated Income Statements (Unaudited) - USD ($) shares in Millions, $ in Millions		3 Months Ended
		Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Sales		$ 2,994.2	$ 2,375.2
Cost of sales		2,223.6	1,632.4
Selling and administrative		232.8	202.7
Research and development		23.3	23.5
Other income (expense), net		8.5	22.5
Operating Income		523.0	539.1
Equity affiliates' income		147.8	69.3
Interest expense		30.5	36.7
Other non-operating income (expense), net		22.6	18.6
Income From Continuing Operations Before Taxes		662.9	590.3
Income tax provision		113.3	113.9
Income From Continuing Operations		549.6	476.4
Income from discontinued operations, net of tax		0.0	10.3
Net Income		549.6	486.7
Net (loss) income attributable to noncontrolling interests of continuing operations		(10.8)	4.7
Net Income Attributable to Air Products		560.4	482.0
Net Income Attributable to Air Products
Net income from continuing operations		560.4	471.7
Net income from discontinued operations		0.0	10.3
Net Income Attributable to Air Products		$ 560.4	$ 482.0
Per Share Data
Basic EPS from continuing operations (in dollars per share)	[1]	$ 2.53	$ 2.13
Basic EPS from discontinued operations (in dollars per share)	[1]	0	0.05
Basic EPS Attributable to Air Products (in dollars per share)	[1]	2.53	2.18
Diluted EPS from continuing operations (in dollars per share)	[1]	2.52	2.12
Diluted EPS from discontinued operations (in dollars per share)	[1]	0	0.05
Diluted EPS Attributable to Air Products (in dollars per share)	[1]	$ 2.52	$ 2.17
Weighted Average Common Shares (in millions)
Basic		221.9	221.5
Diluted		222.6	222.6

[1] *Earnings per share ("EPS") is calculated independently for each component and may not sum to total EPS due to rounding.