Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2014	Jun. 30, 2013	Jun. 29, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]
Net earnings	$ 2.8	$ 10.0	$ 5.3	$ 22.9
Other comprehensive income, net of tax:
Foreign currency translation adjustments, net of tax expense of $0.1, benefit of $0.1, expense of $0.3 and benefit of $0.1, respectively	1.8	(2.4)	2.2	(9.4)
Unrealized gains on investment, net of tax expense of $6.5, $6.6, $6.2 and $11.0, respectively	10.6	11.5	10.5	23.8
Other comprehensive income	12.4	9.1	12.7	14.4
Comprehensive Income	$ 15.2	$ 19.1	$ 18.0	$ 37.3