Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Earnings per Share - Narrative (Details)	Jan. 01, 2022 shares	Dec. 31, 2021 votePerShare shares	Dec. 31, 2023 shares	Dec. 31, 2022 shares	Dec. 31, 2020 shares
Class of Stock [Line Items]
Shares outstanding (in shares)			567,762,932	570,276,188
Common Stock
Class of Stock [Line Items]
Shares outstanding (in shares)		249,000,000	568,000,000	570,000,000
Shares issued upon conversion (in shares)	10
AAM Class B Common Stock \| AAM
Class of Stock [Line Items]
Shares outstanding (in shares)		1
Number of votes per share \| votePerShare		1
AAM Class A Common Stock \| Common Stock
Class of Stock [Line Items]
Shares outstanding (in shares)		249,000,000			229,000,000
AAM \| AAM Class B Common Stock
Class of Stock [Line Items]
Voting power		0.00%
AAM \| AAM Class A Common Stock
Class of Stock [Line Items]
Shares issued upon conversion (in shares)		10