Consolidated Statements of Changes in Shareholders' Equity (Parenthetical) - shares	12 Months Ended
Apr. 27, 2019	Apr. 28, 2018	Apr. 29, 2017
Purchase of treasury stock related to stock-based compensation, shares	161,000	88,000	248,000
Treasury stock repurchased, shares			2,020,000

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration