General (Policies)	9 Months Ended
General (Policies)	Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements include the accounts of Lionsgate and all of its majority-owned and controlled subsidiaries. The unaudited condensed consolidated financial statements have been prepared in accordance with United States (“U.S.”) generally accepted accounting principles (“GAAP”) for interim financial information and the instructions to quarterly report on Form 10-Q under the Securities Exchange Act of 1934, as amended, and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by U.S. GAAP for complete financial statements. In the opinion of the Company’s management, all adjustments (consisting only of normal recurring adjustments) considered necessary for a fair presentation have been reflected in these unaudited condensed consolidated financial statements. Operating results for the three and nine months ended December 31, 2021 are not necessarily indicative of the results that may be expected for the fiscal year ending March 31, 2022. The balance sheet at March 31, 2021 has been derived from the audited financial statements at that date, but does not include all the information and footnotes required by U.S. GAAP for complete financial statements. The accompanying unaudited condensed consolidated financial statements should be read together with the consolidated financial statements and related notes included in the Company's Annual Report on Form 10-K for the fiscal year ended March 31, 2021. Certain amounts presented in prior periods have been reclassified to conform to the current period presentation.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions, including the potential impacts arising from the COVID-19 global pandemic, that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expenses during the reporting period. The most significant estimates made by management in the preparation of the financial statements relate to ultimate revenue and costs used for the amortization of investment in films and television programs and licensed program rights; estimates of sales returns; estimates related to the revenue recognition of sales or usage-based royalties; fair value of equity-based compensation; fair value of assets and liabilities for allocation of the purchase price of companies acquired; income taxes including the assessment of valuation allowances for deferred tax assets; accruals for contingent liabilities; and impairment assessments for investment in films and television programs and licensed program rights, property and equipment, equity investments, goodwill and intangible assets. Actual results could differ from such estimates.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Accounting Guidance Adopted in Fiscal 2022 Reference Rate Reform: In March 2020, the Financial Accounting Standards Board ("FASB") issued guidance which provides optional expedients and exceptions for applying U.S. GAAP to contract modifications, hedging relationships, and other transactions affected by the market transition from the London Interbank Offered Rate (“LIBOR”) and other interbank offered rates to alternative reference rates, if certain criteria are met. Additionally, in January 2021, the FASB issued additional guidance, which allows entities to elect certain optional expedients and exceptions when accounting for derivative contracts and certain hedging relationships affected by changes in the interest rates. The guidance is applicable to contract modifications made and hedging relationships entered into between March 12, 2020 and December 31, 2022. The Company adopted this guidance on July 1, 2021 and is applying its provisions prospectively through December 31, 2022, with no material impact to the Company’s consolidated financial statements. See Note 16 for further information. Accounting for Revenue Contracts Acquired in a Business Combination: In October 2021, the FASB issued guidance which requires entities to recognize and measure contract assets and contract liabilities from contracts with customers acquired in a business combination in accordance with Accounting Standards Codification Topic 606. The Company adopted this guidance on October 1, 2021 and is applying its provisions prospectively, with no material impact to the Company's consolidated financial statements. Accounting Guidance Not Yet Adopted Government Assistance: In November 2021, the FASB issued guidance which requires certain annual disclosures about transactions with a government that are accounted for by applying a grant or contribution accounting model. This guidance is effective for the Company's fiscal year beginning April 1, 2022, with early adoption permitted. The Company does not expect that the adoption of this guidance will have a material effect on its consolidated financial statements.
Net Income (Loss) Per Share	Basic net income (loss) per share is calculated based on the weighted average common shares outstanding for the period.Diluted net income (loss) per common share reflects share purchase options, including share appreciation rights ("SARs"), restricted share units ("RSUs") and restricted stock using the treasury stock method when dilutive, and any contingently issuable shares when dilutive.