Defined Benefit Plans (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Oct. 02, 2015	Sep. 30, 2016	Oct. 02, 2015	Dec. 31, 2016
Defined Benefit Plan Disclosure
Reclassification from AOCI, before Tax	$ (7.2)	$ (0.7)	$ 199.8	$ (21.4)
U.S. pension benefits
Defined Benefit Plan Disclosure
Net periodic benefit cost	(2.2)	1.6	(7.5)	0.0
Defined benefit plans, estimated future employer contributions in current fiscal year			40.0
Non-U.S. pension benefits
Defined Benefit Plan Disclosure
Net periodic benefit cost	9.3	13.4	30.2	36.7
Defined benefit plans, estimated future employer contributions in current fiscal year			45.0
Change in accounting estimate | Scenario, forecast
Defined Benefit Plan Disclosure
Net periodic benefit cost					$ (25.0)
Fortive | Non-U.S. pension benefits
Defined Benefit Plan Disclosure
Net periodic benefit cost		3.0		9.0
Pension and postretirement plan benefit adjustments
Defined Benefit Plan Disclosure
Reclassification from AOCI, before Tax	$ (7.2)	(13.1)	$ (23.6)	(33.8)
Pension and postretirement plan benefit adjustments | Fortive
Defined Benefit Plan Disclosure
Reclassification from AOCI, before Tax		$ 2.0		$ 6.0