Note 4 - Accumulated Other Comprehensive Income (Details) - Changes in Accumulated Other Comprehensive Income by Component, Net of Tax (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Changes in Accumulated Other Comprehensive Income by Component, Net of Tax [Abstract]
Beginning balance, foreign currency translation adjustments	$ 18.1	$ 24.9
Beginning balance, unrealized gains and losses on investment	44.8	13.6
Beginning balance, pension liability adjustments	(1.5)	(3.1)
Beginning balance	61.4	35.4
Other comprehensive income (loss), foreign currency translation adjustments	0.4	(7.0)
Other comprehensive income (loss), unrealized gains and losses on investment	(0.1)	12.3
Other comprehensive income (loss), pension liability adjustments	0	0
Other comprehensive income (loss)	0.3	5.3
Ending balance, foreign currency translation adjustments	18.5	17.9
Ending balance, unrealized gains and losses on investment	44.7	25.9
Ending balance, pension liability adjustments	(1.5)	(3.1)
Ending balance	$ 61.7	$ 40.7