INCOME TAXES - Reconciliation of Income Tax Expenses - Additional Information (Details) $ in Millions	12 Months Ended
May 29, 2022 USD ($)
INCOME TAXES
Tax detriment, Lamb-Weston/Meijer v.o.f.'s intent to withdraw from Russia	$ 13.2

Income Tax Expense (Benefit), Tax Detriment, Equity Method Investment Withdraw from Joint Venture

No definition available.

Name:	lw_IncomeTaxExpenseBenefitTaxDetrimentEquityMethodInvestmentWithdrawFromJointVenture
Namespace Prefix:	lw_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration