Long term Debt - Supply chain finance program (Details) - Letter of credit $ in Millions	9 Months Ended
Sep. 29, 2018 USD ($)
Debt Instrument [Line Items]
Letters of credit outstanding	$ 20.0
Annual fee percentage	4.00%

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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