Business Acquisitions, Goodwill and Acquired Intangible Assets (Assets Acquired and Liabilities Assumed) (Details) (USD $) In Millions, unless otherwise specified	Dec. 28, 2014	Dec. 29, 2013	Dec. 30, 2012
Business Acquisition [Line Items]
Goodwill	$ 1,150.6	$ 1,037.8	$ 990.2
Acquisitions in 2014
Business Acquisition [Line Items]
Current assets, excluding cash acquired	34.0
Property, plant and equipment	8.7
Goodwill	142.8
Other acquired intangible assets	48.2
Other long-term assets	5.3
Total assets acquired	239.0
Current liabilities	(26.0)
Long-term liabilities	(17.2)
Total liabilities assumed	(43.2)
Noncontrolling interests (a)	0
Purchase price, net of cash acquired	195.8
Acquisitions in 2013
Business Acquisition [Line Items]
Current assets, excluding cash acquired		40.1
Property, plant and equipment		8.3
Goodwill		62.5
Other acquired intangible assets		40.6
Other long-term assets		0
Total assets acquired		151.5
Current liabilities		(21.4)
Long-term liabilities		(6.8)
Total liabilities assumed		(28.2)
Noncontrolling interests (a)		4.9
Purchase price, net of cash acquired		$ 128.2