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Sales and Segment Adjusted EBITDA (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Sales	$ 1,293.1	$ 1,522.4	$ 4,184.0	$ 3,494.4
Less: intersegment sales	80.0	108.3	262.5	221.5
Net external sales	1,213.1	1,414.1	3,921.5	3,272.9
Segment Adjusted EBITDA	183.2	297.1	668.7	458.3
Driveline [Member]
Segment Reporting Information [Line Items]
Sales	870.4	1,025.0	2,831.9	2,346.7
Less: intersegment sales	0.8	0.4	2.4	0.5
Net external sales	869.6	1,024.6	2,829.5	2,346.2
Segment Adjusted EBITDA	128.4	199.5	450.2	309.0
Metal Forming [Member]
Segment Reporting Information [Line Items]
Sales	422.7	497.4	1,352.1	1,147.7
Less: intersegment sales	79.2	107.9	260.1	221.0
Net external sales	343.5	389.5	1,092.0	926.7
Segment Adjusted EBITDA	$ 54.8	$ 97.6	$ 218.5	$ 149.3

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- Definition

Sales Revenue, Goods, Net, Inclusive of Intersegment Sales

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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