STATEMENTS OF CONSOLIDATED INCOME - USD ($) shares in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Income Statement [Abstract]
Product sales and service	$ 2,615,000,000.0	$ 2,469,600,000	$ 2,358,100,000
Rental revenue	292,300,000	378,400,000	385,600,000
Revenues	2,907,300,000	2,848,000,000.0	2,743,700,000
Cost of Net Revenue
Rental expenses	151,600,000	179,700,000	187,300,000
Cost of Revenue	1,482,300,000	1,453,800,000	1,423,100,000
Total cost of net revenue	1,330,700,000	1,274,100,000	1,235,800,000
Gross Profit	1,425,000,000.0	1,394,200,000	1,320,600,000
Research and development expenses	139,500,000	135,600,000	133,700,000
Selling and administrative expenses	941,000,000.0	891,600,000	874,500,000
Special charges	28,400,000	77,600,000	37,400,000
Operating Profit	316,100,000	289,400,000	275,000,000.0
Interest expense	(89,600,000)	(95,000,000.0)	(88,900,000)
Loss on extinguishment of debt	(3,300,000)	0	0
Investment income (expense) and other, net	(14,600,000)	2,800,000	(3,100,000)
Income Before Income Taxes	208,600,000	197,200,000	183,000,000.0
Income tax expense (benefit)	56,400,000	(55,200,000)	50,700,000
Net Income	152,200,000	252,400,000	132,300,000
Less: Net loss attributable to noncontrolling interests	0	0	(1,300,000)
Net Income Attributable to Common Shareholders	$ 152,200,000	$ 252,400,000	$ 133,600,000
Net Income Attributable to Common Shareholders per Common Share - Basic (usd per share)	$ 2.28	$ 3.81	$ 2.04
Diluted net income attributable to common shareholders per common share	$ 2.25	$ 3.73	$ 1.99
Average Common Shares Outstanding - Basic (in shares)	66,772	66,234	65,599
Average Common Shares Outstanding - Diluted (in shares)	67,660	67,612	67,225