Note 6 - Redeemable Noncontrolling Interests (Details Textual)	Jun. 22, 2018
Dana TM4 [Member] \| Hydro-Québec [Member]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	45.00%

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant