Organization Organization (Details) Person in Millions	12 Months Ended
Apr. 27, 2019 Person Store segment	Apr. 28, 2018 segment
Number Of Students \| Person	6
Number of Stores \| Store	1,448
Number of Reportable Segments \| segment	3	3

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

No definition available.

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration