Retirement and Postretirement Benefit Plans (Narrative) (Details) $ in Millions		1 Months Ended	12 Months Ended
	Sep. 08, 2015 plan	Sep. 30, 2015 USD ($)	Sep. 30, 2017 USD ($) plan	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Number of retirement plans | plan			5
Settlement charge			$ 0.0	$ 0.0	$ 9.6
Estimated net actuarial loss that will be amortized over the next fiscal year			4.5
Estimated prior service cost that will be amortized over the next fiscal year			0.1
Accumulated Benefit Obligation
Accumulated benefit obligation			325.7	326.3
Defined Contribution Pension and Other Postretirement Plans Disclosure [Abstract]
Defined contribution savings plans expense			$ 26.8	26.8	17.4
Welch Allyn Holdings, Inc. [Member]
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Number of retirement plans assumed in acquisition | plan	1
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of retirement plans | plan			1
Lump sum payments		$ 42.3
Settlement charge		$ 9.6	$ 0.0	0.0	$ 9.6
Net actuarial gains (losses) included in Accumulated Other Comprehensive Income (Loss)			(59.9)	(85.7)
Prior service (credits) costs included in Accumulated Other Comprehensive Income (Loss)			0.6	0.8
Pension items in AOCI, aggregate tax effect			$ 22.8	32.2
Defined Benefit Plan, Information about Plan Assets [Abstract]
Equity securities of one entity, maximum percentage of portfolio			10.00%
Cash Flows
Funded percentage (in excess of)			89.00%
Employer contributions			$ 1.1	$ 31.0
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Discount rate for expense			3.70%	4.40%	4.50%
Discount rate for obligation		4.40%	3.90%	3.70%	4.40%
Postretirement Health Coverage [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of retirement plans | plan			2
Net actuarial gains (losses) included in Accumulated Other Comprehensive Income (Loss)			$ 7.3	$ 5.9
Prior service (credits) costs included in Accumulated Other Comprehensive Income (Loss)			(1.0)	(0.5)
Pension items in AOCI, aggregate tax effect			3.1	2.4
Estimated net actuarial loss that will be amortized over the next fiscal year			(0.6)
Estimated prior service cost that will be amortized over the next fiscal year			(0.2)
Cash Flows
Employer contributions			$ 0.9	$ 1.5
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Discount rate for expense			3.00%	3.50%	3.70%
Discount rate for obligation		3.50%	3.30%		3.50%
Ultimate health care cost trend rate			4.50%
Effect of one-percentage-point increase/decrease on service and interest costs			$ 0.1
Effect of one-percentage-point increase on service and benefit obligation			1.3
Effect of one-percentage-point decrease on service and benefit obligation			1.2
Expected employer contributions required in next year			1.6
Defined benefit plan estimated future employer contributions in next fiscal, per year, thereafter			$ 2.0
Postretirement Health Coverage [Member] | Minimum [Member]
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Discount rate for obligation				2.90%
Health care cost trend rate			6.90%
Postretirement Health Coverage [Member] | Maximum [Member]
Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract]
Discount rate for obligation				3.00%
Health care cost trend rate			8.70%
Germany and France [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of retirement plans | plan			3
Executives [Member]
Defined Benefit Plan Disclosure [Line Items]
Number of retirement plans | plan			1