Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Jan. 02, 2016
Condensed Statement of Income Captions [Line Items]
Unrealized loss on derivatives, tax amount	$ (7.0)	$ 1.9	$ 2.7
Reclassification adjustments into expense, tax amount	(0.3)	(1.7)	(5.3)
Actuarial loss arising during the period, tax amount	(3.3)	(11.2)	8.2
Amortization of prior actuarial losses, tax amount	3.5	1.7	7.3
Other Comprehensive Income Loss Reclassification Adjustment From AOCI Pension and Other Postretirement Benefit Plans Curtailment Gain Loss Tax	0.8	0.0	0.0
Settlement gain included in net income, tax amount	$ 0.0	$ 0.0	$ 0.0