Recent Accounting Pronouncements (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Apr. 01, 2017	Apr. 02, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Income Tax Expense (Benefit)	$ (48.5)	$ 20.7
Diluted Earnings Per Share (in dollars per share)	$ 1.40	$ 1.01
Net Cash Provided by Operating Activities	$ 361.5	$ 334.7
Net Cash Used in Investing Activities	(381.9)	(1,138.9)
Net Cash Provided by Financing Activities	(119.3)	1,142.4
Adjustments for New Accounting Pronouncement [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net Cash Provided by Operating Activities		45.6
Net Cash Used in Investing Activities		(0.4)
Net Cash Provided by Financing Activities		$ (45.6)
Accounting Standards Update 2016-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Income Tax Expense (Benefit)	$ (24.0)
Diluted Earnings Per Share (in dollars per share)	$ 0.06