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Goodwill Rollforward (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Goodwill [Roll Forward]
Goodwill			$ 699.1
Impairment charge	$ 0.0	$ 0.0	(510.0)	$ 0.0
Foreign currency translation			(7.2)
Goodwill	181.9		181.9
Driveline [Member]
Goodwill [Roll Forward]
Goodwill			398.3
Impairment charge			(210.8)
Foreign currency translation			(5.6)
Goodwill	181.9		181.9
Metal Forming [Member]
Goodwill [Roll Forward]
Goodwill			300.8
Impairment charge			(299.2)
Foreign currency translation			(1.6)
Goodwill	$ 0.0		$ 0.0

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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X

- Definition

Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

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- Definition

Amount of increase (decrease) from foreign currency translation adjustments and purchase accounting adjustments of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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