Defined Benefit Plans (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Apr. 01, 2016	Apr. 03, 2015	Dec. 31, 2016
U.S. pension benefits
Defined Benefit Plan Disclosure
Net periodic benefit cost	$ (3.0)	$ (0.7)
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	10.9	$ 14.3
Defined benefit plans, estimated future employer contributions in current fiscal year	$ 55.0
Change in accounting estimate | Scenario, forecast
Defined Benefit Plan Disclosure
Net periodic benefit cost			$ (25.0)