Retirement and Other Employee Benefits - Net Periodic Pension Cost of Defined Benefit Pension and Post-Retirement Benefit Plans (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jul. 01, 2016	Jun. 30, 2017	Jul. 01, 2016
Domestic Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1.4	$ 1.3	$ 2.8	$ 2.6
Interest cost	1.5	1.6	3.1	3.3
Expected return on assets	(0.9)	(0.9)	(1.7)	(1.9)
Amortization of net actuarial loss	0.3	0.3	0.6	0.6
Net periodic benefit costs	2.3	2.3	4.8	4.6
Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit costs	$ 0.9	$ 0.5	$ 1.5	$ 1.1