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Commitments and Contingencies (Details) - USD ($) $ in Millions	Apr. 01, 2017	Dec. 31, 2016	Mar. 26, 2016
Commitments and Contingencies Disclosure [Abstract]
Purchase Obligation, Due Second Year	$ 0.0
Letters of Credit Outstanding, Amount	$ 39.5	$ 44.3	$ 47.6

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- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
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Period Type:	instant

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- Definition

Minimum amount of purchase arrangement maturing in the second fiscal year following the latest fiscal year. Includes, but not limited to, recorded and unrecorded purchase obligations, long-term purchase commitments, and short-term purchase commitments.

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No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant