Pension and Savings Plans Pre-tax Amounts Recorded to Accumulated Other Comprehensive Loss (Details) - Pension Plan $ in Millions	3 Months Ended
Apr. 01, 2017 USD ($)
Amortization:
Net actuarial loss	$ 6.3
Prior service cost	(0.1)
Total recorded in “Accumulated other comprehensive income”	$ (6.4)

Amount, before tax, of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) of defined benefit plan.

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Period Type:	duration