Note 5 - Supplemental Balance Sheet and Cash Flow Information (Details Textual) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Jan. 20, 2026 |
Dec. 31, 2025 |
Sep. 30, 2026 |
Jun. 30, 2026 |
|
| Operating Lease, Right-of-Use Asset | $ 305 | $ 166 | ||
| Supplier Finance Program, Obligation, Current | 59 | 65 | ||
| 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 |