Special Charges (Narrative) (Details) $ in Millions	3 Months Ended					12 Months Ended
	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Jun. 30, 2015 site
Restructuring Cost and Reserve [Line Items]
Special charge						$ 37.4	$ 39.9	$ 41.2
Impairment charges relating to non-cash write-downs of long-lived assets and working capital		$ 25.4
Transaction related costs for businesses to be disposed of						3.0
Restructuring charges						9.7
Proceeds from legal settlement	$ 15.1
Number of site closures | site									5
Cash proceeds from sale of property			$ 6.1
Gain recorded from sale of property			$ 5.2
Settlement charge						0.0	0.0	9.6
Integration and Business Realignment [Member]
Restructuring Cost and Reserve [Line Items]
Special charge						7.6	19.0
Welch Allyn Integration [Member]
Restructuring Cost and Reserve [Line Items]
Special charge					$ 14.4
Employee Severance [Member] | Integration and Business Realignment [Member]
Restructuring Cost and Reserve [Line Items]
Special charge						3.5	14.0
Employee Severance [Member] | Site Consolidation [Member]
Restructuring Cost and Reserve [Line Items]
Special charge						5.1	7.2	2.7
Facility Closing [Member] | Site Consolidation [Member]
Restructuring Cost and Reserve [Line Items]
Special charge						19.7	15.9
Aggregate special charges recognized	34.9					34.9
Other Restructuring [Member] | Site Consolidation [Member]
Restructuring Cost and Reserve [Line Items]
Special charge								1.8
Other Restructuring [Member] | Global Restructuring Program [Member] | Europe [Member]
Restructuring Cost and Reserve [Line Items]
Special charge						0.9	$ 5.1	$ 12.7
Aggregate special charges recognized	$ 43.6					$ 43.6
Architectural Products Business [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges				$ 1.1