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Segment Disclosures - Summary of Revenue From Services by Geographic Area (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
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Jan. 03, 2016 | Sep. 27, 2015 | Jun. 28, 2015 | Mar. 29, 2015 | Dec. 28, 2014 | Sep. 28, 2014 | Jun. 29, 2014 | Mar. 30, 2014 | Jan. 03, 2016 | Dec. 28, 2014 | Dec. 29, 2013
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from services | $ 1,461.6 | $ 1,351.0 | $ 1,385.0 | $ 1,320.6 | $ 1,425.0 | $ 1,396.4 | $ 1,410.5 | $ 1,330.8 | $ 5,518.2 | [1] | $ 5,562.7 | $ 5,413.1
Domestic |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from services |  |  |  |  |  |  |  |  | 3,705.2 |  | 3,535.8 | 3,419.9
International |  |  |  |  |  |  |  |  |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Revenue from services |  |  |  |  |  |  |  |  | $ 1,813.0 |  | $ 2,026.9 | $ 1,993.2
[1] | Fiscal year included 53 weeks.

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- Definition Aggregate revenue during the period from services rendered in the normal course of business, after deducting allowances and discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1(d)) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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