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Stellantis N.V. [Member] Stellantis N.V. Schedule of Contract Liabilities Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Class of warrant or right, fair value of each warrant (in dollars per share) Class Of Warrant Or Right, Fair Value Of Each Warrant Class Of Warrant Or Right, Fair Value Of Each Warrant Number of putative stockholders lawsuit Loss Contingency, New Claims Filed, Number United Airlines Inc. United Airlines Inc. [Member] United Airlines Inc. Member Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Milestone period Business Combination, Contingent Consideration, Milestone Period Business Combination, Contingent Consideration, Milestone Period Number of tranches forfeited Share-based Compensation Arrangement by Share-based Payment Award, Number Of Tranches Forfeited Share-based Compensation Arrangement by Share-based Payment Award, Number Of Tranches Forfeited Description of Business and Basis of Presentation Basis of Presentation and Significant Accounting Policies [Text Block] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Warrant liabilities Warrant Liabilities, Noncurrent Warrant Liabilities, Noncurrent