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Document and Entity Information
Mar. 25, 2021
Cover [Abstract]  
Entity Registrant Name General Motors Co
Amendment Flag true
Entity Central Index Key 0001467858
Document Type 8-K/A
Document Period End Date Mar. 25, 2021
Entity Incorporation State Country Code DE
Entity File Number 001-34960
Entity Tax Identification Number 27-0756180
Entity Address, Address Line One 300 Renaissance Center
Entity Address, City or Town Detroit
Entity Address, State or Province MI
Entity Address, Postal Zip Code 48265-3000
City Area Code (313)
Local Phone Number 667-1500
Written Communications false
Soliciting Material false
Pre Commencement Tender Offer false
Pre Commencement Issuer Tender Offer false
Security 12b Title Common Stock, $0.01 par value
Trading Symbol GM
Security Exchange Name NYSE
Entity Emerging Growth Company false
Amendment Description (d) On March 25, 2021, General Motors Company (“GM” or the “Company”) filed a Current Report on Form 8-K (the “Initial 8-K”), which announced the appointment of Margaret C. Whitman and Mark A. Tatum to GM’s Board of Directors (the “Board”) effective as of that date. At the time of the Initial 8-K, the Board had not yet determined committee assignments for Ms. Whitman or Mr. Tatum. In accordance with instruction no. 2 of the Instructions to Item 5.02 of Form 8-K, the Company is filing this amendment to the Initial 8-K to disclose that, on December 7, 2021, the Board designated (i) Ms. Whitman as a member of the Executive Compensation Committee and the Governance and Corporate Responsibility Committee and (ii) Mr. Tatum as a member of the Audit Committee and the Governance and Corporate Responsibility Committee, in each case effective as of that date.