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Reporting Segment And Geographic Information Reporting Segment And Geographic Information - Narratives (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 29, 2017 USD ($) | Sep. 29, 2017 USD ($) | Jun. 30, 2017 USD ($) | Mar. 31, 2017 USD ($) segment | Dec. 30, 2016 USD ($) | Sep. 30, 2016 USD ($) | Jul. 01, 2016 USD ($) | Apr. 01, 2016 USD ($) | Dec. 29, 2017 USD ($) segment | Dec. 30, 2016 USD ($) segment | Jan. 01, 2016 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 708.4 | $ 670.0 | $ 661.9 | $ 613.9 | $ 585.5 | $ 584.1 | $ 609.6 | $ 583.0 | $ 2,654.2 | [1] | $ 2,362.2 | [1] | $ 2,290.4 | [1]
Number of Reportable Segments | segment |  |  |  | 4 |  |  |  |  | 4 |  | 4 |  |  |
Restructuring Liability, Current | $ 1.4 |  |  |  |  |  |  |  | $ 1.4 |  |  |  |  |
Ten Percent Customer member [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 0.0 |  | $ 0.0 |  | $ 0.0 |
Ten Percent Customer member [Member] | Sales Revenue, Net [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  |  |  |  |  | 10.00% |  | 10.00% |  | 10.00% |
Ten Percent Accounts Receivable member [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 0.0 |  | $ 0.0 |  |  |
Ten Percent Accounts Receivable member [Member] | Accounts Receivable [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Concentration Risk, Percentage |  |  |  |  |  |  |  |  | 10.00% |  | 10.00% |  |  |
[1] | Revenue is attributed to countries based on the location of the customer.

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