Consolidated Statements of Comprehensive (Loss)/Income (Parenthetical) $ in Thousands	Dec. 31, 2022 USD ($)
Income Statement [Abstract]
Net income from discontinued operations	$ 169,631

Amount of income gain for the disposal of assets and liabilities, including discontinued operation.

No definition available.

Name:	nm_DisposalGroupIncludingDiscontinuedOperationIncomeGain
Namespace Prefix:	nm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant