Fair Value Measurements (Schedule of Other Investments) (Details) - USD ($) $ in Millions |
6 Months Ended | 12 Months Ended | |||||
---|---|---|---|---|---|---|---|
Jun. 29, 2017 |
Dec. 29, 2016 |
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Schedule Of Fair Value Of Separate Accounts By Major Category Of Investment [Line Items] | |||||||
Other investments | [1] | $ 2.5 | $ 5.6 | ||||
Total other investments | $ 3.6 | $ 6.6 | |||||
Maximum [Member] | |||||||
Schedule Of Fair Value Of Separate Accounts By Major Category Of Investment [Line Items] | |||||||
Cost-method ownership percentage | 20.00% | 20.00% | |||||
AC JV, LLC [Member] | |||||||
Schedule Of Fair Value Of Separate Accounts By Major Category Of Investment [Line Items] | |||||||
Investment in AC JV, LLC | [2] | $ 1.1 | $ 1.0 | ||||
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