Retirement and Other Employee Benefits (Net Periodic Pension Cost of Defined Benefit Pension and Post-Retirement Benefit Plans) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 30, 2012	Apr. 01, 2011
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1.1	$ 0.9
Interest cost	1.6	1.8
Expected return on assets	(0.9)	(1.0)
Amortization of net actuarial loss	0.3	0.4
Net periodic benefit costs	$ 2.1	$ 2.1