XML 56 R44.htm IDEA: XBRL DOCUMENT v3.24.2.u1

Inventories - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2023	Dec. 31, 2023
Inventory Disclosure [Abstract]
Lower of cost or market adjustment	$ 9.5	$ 9.5	$ 2.6

X

- Definition

Lower Of Cost Or Market Adjustment.

+ References

No definition available.

+ Details

Name:	gpre_LowerOfCostOrMarketAdjustment
Namespace Prefix:	gpre_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_InventoryDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration