Consolidated Income Statements (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended				9 Months Ended
	Jun. 30, 2012		Jun. 30, 2011		Jun. 30, 2012		Jun. 30, 2011
Consolidated Income Statements [Abstract]
Sales	$ 2,340.1		$ 2,472.0		$ 7,005.9		$ 7,167.5
Cost of sales	1,690.8		1,825.7		5,128.9		5,243.5
Selling and administrative	230.4		234.5		698.8		703.0
Research and development	32.5		29.3		90.3		86.4
Cost reduction plan	0	[1]	0	[1]	86.8	[1]	0	[1]
Gain on previously held equity interest	85.9		0		85.9		0
Net loss on Airgas transaction			0				48.5
Other income, net	10.5		5.2		37.5		26.6
Operating Income	482.8		387.7		1,124.5		1,112.7
Equity affiliates' income	41.7		39.7		114.3		99.2
Interest expense	26.0		26.5		84.8		86.9
Income from Continuing Operations before Taxes	498.5		400.9		1,154.0		1,125.0
Income tax provision	133.3		95.4		269.5		271.9
Income from Continuing Operations	365.2		305.5		884.5		853.1
Income from Discontinued Operations, net of tax	127.3		29.5		166.5		69.3
Net Income	492.5		335.0		1,051.0		922.4
Less: Net Income Attributable to Noncontrolling Interests	8.0		8.5		22.4		23.0
Net Income Attributable to Air Products	484.5		326.5		1,028.6		899.4
Net Income Attributable to Air Products
Income from continuing operations	357.2		297.0		862.1		830.1
Income from discontinued operations	127.3		29.5		166.5		69.3
Net Income Attributable to Air Products	$ 484.5		$ 326.5		$ 1,028.6		$ 899.4
Basic Earnings Per Common Share Attributable to Air Products
Income from continuing operations	$ 1.69		$ 1.40		$ 4.08		$ 3.89
Income from discontinued operations	$ 0.60		$ 0.14		$ 0.79		$ 0.32
Net Income Attributable to Air Products	$ 2.29		$ 1.54		$ 4.87		$ 4.21
Diluted Earnings Per Common Share Attributable to Air Products
Income from continuing operations	$ 1.66		$ 1.37		$ 4.02		$ 3.80
Income from discontinued operations	$ 0.60		$ 0.13		$ 0.77		$ 0.32
Net Income Attributable to Air Products	$ 2.26		$ 1.50		$ 4.79		$ 4.12
Weighted Average of Common Shares Outstanding (in millions)	211.5		212.5		211.0		213.5
Weighted Average of Common Shares Outstanding Assuming Dilution (in millions)	214.7		217.3		214.6		218.4
Dividends Declared Per Common Share - Cash	$ 0.64		$ 0.58		$ 1.86		$ 1.65

[1] Information about how this charge related to the businesses at the segment level is discussed in Note 4, Cost Reduction Plan.