Note 20 - Equity Affiliates - Equity Method Investments (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Investments in equity affiliates	$ 142
Investments in affiliates carried at cost	2
Investments in affiliates	$ 144	$ 152
Dongfeng Dana Axle Co., Ltd. (DDAC) [Member]
Investments in equity affiliates, ownership percentage	50.00%
Investments in equity affiliates	$ 105
ROC-Spicer, Ltd. [Member]
Investments in equity affiliates, ownership percentage	50.00%
Investments in equity affiliates	$ 23
Axles India Limited [Member]
Investments in equity affiliates, ownership percentage	48.00%
Investments in equity affiliates	$ 9
All Others as a Group [Member]
Investments in equity affiliates	$ 5

The amount of equity method investments carried at cost.

No definition available.

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

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- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

Amount of investment in equity method investee and investment in and advance to affiliate.

+ References

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-Name Accounting Standards Codification
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