Commitments and Contingencies (Narrative) (Details) $ in Millions	Apr. 24, 2017 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Litigation Settlement, Amount	$ 9.9

Amount awarded to other party in judgment or settlement of litigation.

No definition available.

Name:	us-gaap_LitigationSettlementAmountAwardedToOtherParty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration