Inventories (Narrative) (Details) $ in Thousands	Oct. 03, 2020 USD ($)
Inventories [Abstract]
Non-cash inventory reserves related to impact of COVID-19	$ 16,319

Inventory Write-down Reserve for non-cash impairment impacts associated with COVID-19 pandemic

No definition available.

Name:	mog_InventoryWritedownReserve
Namespace Prefix:	mog_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant