NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - General Information (Details)	Nov. 09, 2016
NATURE OF OPERATIONS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Divestiture of stock pro rata distribution (as a percent)	100.00%

Represents the pro rata distribution of stock for the divestiture by Conagra of Lamb Weston.

No definition available.

Name:	lw_DivestitureOfStockProRataDistributionPercent
Namespace Prefix:	lw_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration