Taxes Based on Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Taxes Based on Income
Discrete tax benefits impacting the effective tax rate related to retroactive reinstatement of the federal research and development tax credit			$ 4.2
Discrete tax benefits impacting the effective tax rate for revaluation of deferred tax balances due to a change in the municipal statutory tax rate			3.7
Income from continuing operations before taxes	74.8	54.5	265.4	190.4
Provision for income taxes	12.8	18.6	65.8	60.8
Effective tax rate (as a percent)	17.10%	34.10%	24.80%	31.90%
Discrete tax benefits		3.9	13.8	3.9
Benefits from favorable tax rates associated with certain earnings from the entity's operations in lower-tax jurisdictions throughout the world	4.1		4.1
Benefit from the effective settlement of uncertain tax positions	1.3		1.3
Discrete tax benefits related to domestic income taxes	4.9		4.9
Discrete tax benefits related to effective settlement of uncertain tax positions	2.9
Discrete tax benefits related to changes in tax law			8.9
Reasonably possible decrease in unrecognized tax benefits during next 12 months	$ 13		$ 13