Segment Disclosures - Summary of Revenue From Services by Geographic Area (Details) - USD ($) $ in Millions	3 Months Ended									12 Months Ended
	Jan. 01, 2017	Oct. 02, 2016	Jul. 03, 2016	Apr. 03, 2016	Jan. 03, 2016	[1]	Sep. 27, 2015	Jun. 28, 2015	Mar. 29, 2015	Jan. 01, 2017	Jan. 03, 2016		Dec. 28, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from services	$ 1,304.4	$ 1,247.8	$ 1,375.5	$ 1,349.1	$ 1,461.6		$ 1,351.0	$ 1,385.0	$ 1,320.6	$ 5,276.8	$ 5,518.2	[2]	$ 5,562.7
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from services										3,722.5	3,705.2		3,535.8
International
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue from services										$ 1,554.3	$ 1,813.0		$ 2,026.9

[1] Fourth Quarter 2015 included 14 weeks.

[2] Fiscal year included 53 weeks.