Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2018	Mar. 31, 2017
Net (loss) income	$ (18.0)	$ 399.2
Other comprehensive (loss) income, net of tax:
Currency translation adjustments	(2.3)	2.4
Derivatives, net of $- and $- tax	0.4	0.2
Benefit plans, net of $- and ($31.4) tax	(0.5)	46.6
Other Comprehensive Income (Loss), Unrealized Holding Gain (Loss) on Securities Arising During Period, Net of Tax	0.0	13.4
Total other comprehensive (loss) income, net of tax	(2.4)	62.6
Comprehensive (loss) income	$ (20.4)	$ 461.8