Consolidated Statements of Equity (USD $) In Millions	Total	Common Stock [Member]	Capital in Excess of Par [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Treasury Stock [Member]	Air Products Shareholders' Equity [Member]	Noncontrolling Interests [Member]
Balance, beginning of period at Sep. 30, 2011	$ 5,938.7	$ 249.4	$ 805.6	$ 8,599.5	$ (1,253.4)	$ (2,605.3)	$ 5,795.8	$ 142.9
Net Income	1,195.7			1,167.3			1,167.3	28.4
Other comprehensive income (loss)	(90.5)				(95.4)		(95.4)	4.9
Cash Dividends	(529.0)			(529.0)			(529.0)
Share-based compensation expense	43.4		43.4				43.4
Purchase of treasury shares	(53.1)					(53.1)	(53.1)
Issuance of treasury shares for stock option and award plans	115.4		(74.6)			190.0	115.4
Tax benefit of stock option and award plans	38.6		38.6				38.6
Indura business combination	14.8							14.8
Dividends to noncontrolling interests	(26.7)							(26.7)
Purchase of noncontrolling interests	(6.3)		(4.4)				(4.4)	(1.9)
Other	(17.7)		1.9	(3.3)			(1.4)	(16.3)
Balance, end of period at Sep. 30, 2012	6,623.3	249.4	810.5	9,234.5	(1,348.8)	(2,468.4)	6,477.2	146.1
Net Income	1,024.4			994.2			994.2	30.2
Other comprehensive income (loss)	327.2				328.2		328.2	(1.0)
Cash Dividends	(579.6)			(579.6)			(579.6)
Share-based compensation expense	43.5		43.5				43.5
Purchase of treasury shares	(461.6)					(461.6)	(461.6)
Issuance of treasury shares for stock option and award plans	210.3		(87.4)			297.7	210.3
Tax benefit of stock option and award plans	35.5		35.5				35.5
Dividends to noncontrolling interests	(18.4)							(18.4)
Purchase of noncontrolling interests	(2.9)		(2.9)				(2.9)
Other	(2.8)			(2.7)			(2.7)	(0.1)
Balance, end of period at Sep. 30, 2013	7,198.9	249.4	799.2	9,646.4	(1,020.6)	(2,632.3)	7,042.1	156.8
Net Income	1,020.5			991.7			991.7	28.8
Other comprehensive income (loss)	(226.9)				(221.3)		(221.3)	(5.6)
Cash Dividends	(641.8)			(641.8)			(641.8)
Share-based compensation expense	44.0		44.0				44.0
Issuance of treasury shares for stock option and award plans	125.4		(30.0)			155.4	125.4
Tax benefit of stock option and award plans	29.3		29.3				29.3
Dividends to noncontrolling interests	(24.4)							(24.4)
Purchase of noncontrolling interests	(0.5)		(0.5)				(0.5)
Other	(3.1)			(3.1)			(3.1)
Balance, end of period at Sep. 30, 2014	$ 7,521.4	$ 249.4	$ 842.0	$ 9,993.2	$ (1,241.9)	$ (2,476.9)	$ 7,365.8	$ 155.6