Pension and Other Post Retirement Benefits (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Apr. 02, 2015
Defined Benefit Plans [Member]
Pension and Other Post-Retirement Benefits
Service cost	$ 0.3	$ 0.3
Interest cost	11.7	12.0
Expected return on plan assets	(19.5)	(20.7)
Amortization of net loss	0.7	1.0
Defined Benefit Plan, Special Termination Benefits	11.0	0.0
Net periodic pension income	4.2	(7.4)
Other Benefits [Member]
Pension and Other Post-Retirement Benefits
Service cost	0.6	0.7
Interest cost	0.6	0.6
Amortization of net loss	(0.1)	0.0
Defined Benefit Plan, Special Termination Benefits	3.1	0.0
Net periodic pension income	4.2	$ 1.3
U.K. pension plan [Member]
Pension And Other Post Retirement Benefits Textuals [Abstract]
Expected UK Pension Plan Contribution For The Year	0.0
Supplemental Executive Retirement Plan [Member]
Pension And Other Post Retirement Benefits Textuals [Abstract]
Defined Benefit Plan Estimated Future Employer Contributions Remainder Of Year	$ 6.8