ANNUAL COMBINED STATEMENTS OF CHANGES IN AIR PRODUCTS’ INVESTED EQUITY AND NONCONTROLLING INTERESTS - USD ($) $ in Millions	Total	Air Products’ Net Investment	Accumulated Other Comprehensive Income (Loss)	Total Air Products’ Invested Equity	Non-controlling Interests
Stockholders' equity, beginning balance at Sep. 30, 2013	$ 961.1	$ 908.4	$ 16.5	$ 924.9	$ 36.2
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	130.7	123.6		123.6	7.1
Other comprehensive income (loss)	(3.9)		(3.0)	(3.0)	(0.9)
Share-based compensation	4.6	4.6		4.6
Dividends to non-controlling interests	5.0				5.0
Net transfers to Air Products	(214.1)	(214.1)		(214.1)
Stockholders' equity, ending balance at Sep. 30, 2014	873.4	822.5	13.5	836.0	37.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	191.2	184.1		184.1	7.1
Other comprehensive income (loss)	(48.4)		(46.3)	(46.3)	(2.1)
Share-based compensation	4.7	4.7		4.7
Dividends to non-controlling interests	9.8				9.8
Net transfers to Air Products	(270.4)	(269.8)		(269.8)	(0.6)
Stockholders' equity, ending balance at Sep. 30, 2015	740.7	741.5	(32.8)	708.7	32.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	219.9	212.0		212.0	7.9
Other comprehensive income (loss)	22.8		22.8	22.8	0.0
Share-based compensation	5.0	5.0		5.0
Dividends to non-controlling interests	7.6				7.6
Net transfers to Air Products	(1,084.2)	(1,085.8)		(1,085.8)	1.6
Stockholders' equity, ending balance at Sep. 30, 2016	$ (103.4)	$ (127.3)	$ (10.0)	$ (137.3)	$ 33.9