Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 02, 2016	Sep. 27, 2015	Oct. 02, 2016	Sep. 27, 2015
Statement of Comprehensive Income [Abstract]
Net earnings	$ 80.9	$ 9.1	$ 101.0	$ 19.6
Other comprehensive income, net of tax:
Foreign currency translation adjustments, net of tax benefit of $1.8 million, $0.2 million, $1.7 million and $0.4 million, respectively	1.8	(9.8)	13.1	(15.5)
Less: Reclassification adjustments included in net earnings	0.2	0.0	(0.1)	(0.2)
Foreign currency translation adjustments	2.0	(9.8)	13.0	(15.7)
Unrealized gains on investment, net of tax expense of $0.6 million, $8.9 million, $4.3 million and $12.7 million, respectively	1.3	16.4	8.8	23.0
Other comprehensive income	3.3	6.6	21.8	7.3
Comprehensive income	$ 84.2	$ 15.7	$ 122.8	$ 26.9