Dispositions (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2025	Dec. 31, 2024
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current assets held-for-sale	$ 67.8	$ 58.1
Current liabilities held-for-sale	34.1	$ 24.4
AAM India Manufacturing Corporation Pvt., Ltd.
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Including Discontinued Operation, Consideration	65.0
Current assets held-for-sale	67.8
Current liabilities held-for-sale	34.1
Hefei AAM Automotive Driveline & Chassis System Co., Ltd. and Liuzhou AAM Automotive Driveline System Co., Ltd.
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Proceeds from Divestiture of Interest in Joint Venture	$ 30.1

Amount classified as assets attributable to disposal group held for sale or disposed of, expected to be disposed of within one year or the normal operating cycle, if longer.

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