Inventories (Narrative) (Details) pullet_and_breeder in Millions, Layers in Millions	Feb. 26, 2022 Layers pullet_and_breeder
Inventories [Abstract]
Pullets and breeders \| pullet_and_breeder	9.4
Layers \| Layers	42.7

Agricultural Related Inventory, Pullets and Breeders

No definition available.

Name:	calm_AgriculturalRelatedInventoryPulletsandBreeders
Namespace Prefix:	calm_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant