Note 5 - Supplemental Balance Sheet and Cash Flow Information (Details Textual) - USD ($) $ in Millions		3 Months Ended	6 Months Ended
Jan. 20, 2026	Dec. 31, 2025	Jun. 30, 2026
Operating Lease, Right-of-Use Asset		$ 305	$ 166
Supplier Finance Program, Obligation, Current		59	54
Payments to Noncontrolling Interests			$ 190
Dana TM4 Inc., Dana TM4 Electric Holdings BV and Dana TM4 USA, LLC [Member]
Noncontrolling Interest, Change in Redemption Value		$ (190)
Payments to Noncontrolling Interests	$ 190
Dana TM4 Inc., Dana TM4 Electric Holdings BV and Dana TM4 USA, LLC [Member] \| Hydro-Québec [Member]
Subsidiary, Ownership Percentage, Noncontrolling Owner			45.00%
Operating Lease Modified as Finance Lease [Member]
Operating Lease, Right-of-Use Asset			$ 62
Operating Lease, Liability			57
Finance Lease, Right-of-Use Asset, after Accumulated Amortization			103
Finance Lease, Liability			$ 98

Present value of lessee's discounted obligation for lease payments from finance lease.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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