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Revenue - Revenue by Country (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 29, 2019 | Dec. 30, 2018 | Dec. 31, 2017
Disaggregation of Revenue [Line Items] |  |  |
Revenue from services | $ 5,355.6 | $ 5,513.9 | $ 5,374.4
United States |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from services | 3,892.5 | 3,930.0 |
Canada |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from services | 136.1 | 142.4 |
Mexico |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from services | 123.6 | 125.0 |
Puerto Rico |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from services | 74.6 | 96.6 |
Brazil |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from services | 34.1 | 35.2 |
Total Americas |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from services | 4,260.9 | 4,329.2 |
France |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from services | 248.6 | 278.9 |
Switzerland |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from services | 200.7 | 212.7 |
Portugal |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from services | 179.8 | 196.9 |
Russia |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from services | 117.6 | 100.4 |
United Kingdom |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from services | 103.1 | 108.8 |
Italy |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from services | 75.9 | 77.5 |
Germany |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from services | 41.6 | 57.1 |
Ireland |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from services | 33.1 | 44.6 |
Other |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from services | 67.5 | 85.6 |
Total EMEA |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from services | 1,067.9 | 1,162.5 |
Total APAC |  |  |
Disaggregation of Revenue [Line Items] |  |  |
Revenue from services | $ 26.8 | $ 22.2 |

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- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045 + Details
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