Consolidated Income Statements (Unaudited) - USD ($) shares in Millions, $ in Millions		3 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Income Statement [Abstract]
Sales		$ 2,375.2	$ 2,254.7
Cost of sales		1,632.4	1,486.6
Selling and administrative		202.7	201.7
Research and development		23.5	17.7
Other income (expense), net		22.5	12.3
Operating Income		539.1	561.0
Equity affiliates' income		69.3	58.2
Interest expense		36.7	18.7
Other non-operating income (expense), net		18.6	9.1
Income From Continuing Operations Before Taxes		590.3	609.6
Income tax provision		113.9	120.7
Income From Continuing Operations		476.4	488.9
Income from discontinued operations, net of tax		10.3	0.0
Net Income		486.7	488.9
Net income attributable to noncontrolling interests of continuing operations		4.7	13.3
Net Income Attributable to Air Products		482.0	475.6
Net Income Attributable to Air Products
Net income from continuing operations		471.7	475.6
Net income from discontinued operations		10.3	0.0
Net Income Attributable to Air Products		$ 482.0	$ 475.6
Per Share Data
Basic EPS from continuing operations (in dollars per share)	[1]	$ 2.13	$ 2.15
Basic EPS from discontinued operations (in dollars per share)	[1]	0.05	0
Basic EPS Attributable to Air Products (in dollars per share)	[1]	2.18	2.15
Diluted EPS from continuing operations (in dollars per share)	[1]	2.12	2.14
Diluted EPS from discontinued operations (in dollars per share)	[1]	0.05	0
Diluted EPS Attributable to Air Products (in dollars per share)	[1]	$ 2.17	$ 2.14
Weighted Average Common Shares (in millions)
Basic		221.5	220.9
Diluted		222.6	222.2

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