Geographical Information (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2015	Sep. 26, 2015	Jun. 27, 2015	Mar. 28, 2015	Dec. 31, 2014	Sep. 27, 2014	Jun. 28, 2014	Mar. 29, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues		$ 4,652.5	$ 4,123.2	$ 4,270.9	$ 3,918.8	$ 4,492.8	$ 4,171.4	$ 4,321.9	$ 3,903.5	$ 16,965.4	$ 16,889.6	$ 13,090.3
Long-lived Assets		2,448.8				2,426.5				2,448.8	2,426.5	1,767.4
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[1]									8,607.3	8,147.7	6,617.0
Long-lived Assets		1,532.0				1,501.7				1,532.0	1,501.7	892.9
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[1]									1,376.4	1,223.1	896.6
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[1]									899.7	1,005.9	758.6
Long-lived Assets		169.4				170.3				169.4	170.3	165.9
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[1]									778.1	754.5	532.4
Long-lived Assets		261.1				265.5				261.1	265.5	224.3
All Other Countries
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	[1]									5,303.9	5,758.4	4,285.7
Long-lived Assets		$ 486.3				$ 489.0				$ 486.3	$ 489.0	$ 484.3

[1] Revenues are attributed to countries based on customer location.