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Basis of Presentation - Additional Information (Detail) | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2023 USD ($) shares | Dec. 31, 2022 USD ($) shares | Dec. 31, 2023 USD ($) Segment shares | Dec. 31, 2022 USD ($) shares | May 30, 2023 shares | Mar. 31, 2023 USD ($) shares | Oct. 01, 2022 USD ($)
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Revenue, practical expedient, financing component |  |  | true |  |  |  |
Remaining performance obligations | $ 3,700,000,000 |  | $ 3,700,000,000 |  |  |  |
Number of reportable segments | Segment |  |  | 3 |  |  |  |
Increase in collections in excess of revenues and deferred revenues |  |  | $ 134,000,000 |  |  |  |
Collections in excess of revenues and deferred revenues, recognized revenue | 14,100,000 | $ 10,700,000 | 91,300,000 | $ 108,400,000 |  |  |
Restricted cash relates to deposits required by certain counterparties as collateral pursuant to outstanding letters of credit |  |  |  |  |  | $ 30,532,000 |
Capitalized interest expense | 45,700,000 | 44,000,000 | $ 172,600,000 | 116,100,000 |  |  |
Proportion of insured amount to asset net book value |  |  | On July 12, 2023, the Company reported a reflector deployment issue that materially impacted the performance of the ViaSat-3 F1 satellite. The Company and the reflector provider conducted a rigorous review of the development and deployment of the affected reflector to determine its impact and potential remedial measures. In connection with the root cause analysis, the Company determined that while the satellite payload is functional, the Company will recover less than 10% of the planned throughput on the ViaSat-3 F1 satellite. |  |  |  |
Operating lease, existence of option to terminate |  |  | true |  |  |  |
Operating lease, option to terminate, description |  |  | some of which include renewal options, and some of which include options to terminate the leases within one year. |  |  |  |
Total capitalized costs related to patents | 3,800,000 |  | $ 3,800,000 |  |  | 3,700,000 |
Total capitalized costs related to orbital slots and other licenses | 107,800,000 |  | 107,800,000 |  |  | 77,000,000 |
Accumulated amortization of patents, orbital slots and other licenses | 8,000,000 |  | 8,000,000 |  |  | 6,800,000 |
Patents, orbital slots and other licenses amortization expense |  | 1,100,000 | 1,200,000 | 1,100,000 |  |  |
Debt issuance costs capitalized |  |  | 50,400,000 | 0 |  |  |
Capitalized costs, net, related to software developed for resale | 235,064,000 |  | 235,064,000 |  |  | 222,155,000 |
Capitalized cost related to software development for resale | 25,100,000 | 15,700,000 | 56,100,000 | 40,300,000 |  |  |
Amortization expense of capitalized software development costs | 14,700,000 | 14,200,000 | 43,200,000 | 37,100,000 |  |  |
Self-insurance liability | 7,200,000 |  | 7,200,000 |  |  | $ 7,900,000 |
Repurchase and immediate retirement of treasury shares pursuant to vesting of certain RSU agreements | value | 8,655,000 | 15,089,000 | 11,220,000 | 15,921,000 |  |  |
Stock-based compensation expense |  |  | 65,669,000 | 64,941,000 |  |  |
Payments for repurchase of common stock |  |  |  | 30,000,000 |  |  |
Common stock, shares authorized | shares |  |  |  |  | 200,000,000 | 100,000,000 |
Insurance claim receivables | 770,000,000 |  | 770,000,000 |  |  |  |
Selling, general and administrative expenses | 271,734,000 | 162,845,000 | 1,640,304,000 | 511,661,000 |  |  |
Continuing Operations [Member] |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Stock-based compensation expense | 22,200,000 | $ 20,400,000 | $ 65,700,000 | $ 62,500,000 |  |  |
Link-16 Tactical Data Link Business [Member] |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Disposal consideration |  |  |  |  |  |  | $ 1,960,000,000
Accounting Standards Update 2021-08 [Member] |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Description of new accounting pronouncements |  |  | In October 2021, the Financial Accounting Standards Board (FASB) issued ASU 2021-08, Business Combinations (Topic 805): Accounting for Contract Assets and Contract Liabilities from Contracts with Customers. ASU 2021-08 requires contract assets and contract liabilities acquired in a business combination to be recognized in accordance with Topic 606 as if the acquirer had originated the contracts. The Company adopted the new guidance prospectively in the first quarter of fiscal year 2024 and applied its provisions to the Inmarsat Acquisition (see Note 4 – Acquisition). |  |  |  |
Accounting Standards Update 2022-01 [Member] |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Description of new accounting pronouncements |  |  | In March 2022, the FASB issued ASU 2022-01, Derivatives and Hedging (Topic 815): Fair Value Hedging—Portfolio Layer Method. ASU 2022-01 clarifies the accounting and promotes consistency in reporting for hedges where the portfolio layer method is applied. The Company adopted the new guidance in the first quarter of fiscal year 2024 and the guidance did not have a material impact on its consolidated financial statements and disclosures. |  |  |  |
Accounting Standards Update 2022-02 [Member] |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Description of new accounting pronouncements |  |  | In March 2022, the FASB issued ASU 2022-02, Financial Instruments – Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures. ASU 2022-02 eliminates the accounting guidance for troubled debt restructurings by creditors in Subtopic 310-40, Receivables – Troubled Debt Restructurings by Creditors, while enhancing certain disclosure requirements for loan refinancings and restructurings by creditors when a borrower is experiencing financial difficulty. Furthermore, it requires that an entity disclose current-period gross write-offs by year of origination for financing receivables and net investments in leases within the scope of Subtopic 326-20, Financial Instruments – Credit Losses – Measured at Amortized Cost. The Company adopted the new guidance prospectively in the first quarter of fiscal year 2024 and the guidance did not have a material impact on its consolidated financial statements and disclosures. |  |  |  |
Accounting Standards Update 2022-03 [Member] |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Description of new accounting pronouncements |  |  | In June 2022, the FASB issued ASU 2022-03, Fair Value Measurement (Topic 820): Fair Value Measurement of Equity Securities Subject to Contractual Sale Restrictions. ASU 2022-03 clarifies that a contractual restriction on the sale of an equity security is not considered in measuring the security's fair value. The standard also requires certain disclosures for equity securities that are subject to contractual restrictions. The new standard will become effective for the Company beginning in fiscal year 2025. The Company is currently evaluating the impact of this standard on its consolidated financial statements and disclosures. |  |  |  |
Accounting Standards Update 2022-04 [Member] |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Description of new accounting pronouncements |  |  | In September 2022, the FASB issued ASU 2022-04, Liabilities – Supplier Finance Programs (Subtopic 405-50): Disclosure of Supplier Finance Program Obligations. ASU 2022-04 enhances the transparency of supplier finance programs. In each annual reporting period, the buyer in a supplier finance program is required to disclose information about the key terms of the program, the outstanding confirmed amounts, a rollforward of such amounts, and a description of where those obligations are presented in the balance sheet. In each interim reporting period, the buyer should disclose the outstanding confirmed amounts as of the end of the interim period. The Company adopted the new guidance in the first quarter of fiscal year 2024 (including early adoption of the amendment on the rollforward information) and the guidance did not have a material impact on its consolidated financial statements and disclosures. |  |  |  |
Accounting Standards Update 2023-01 [Member] |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Description of new accounting pronouncements |  |  | In March 2023, the FASB issued ASU 2023-01, Leases (Topic 842) – Common Control Agreements. The amendments in this update that apply to public business entities clarify the accounting for leasehold improvements associated with common control leases. The new standard will become effective for the Company beginning in fiscal year 2025. The Company is currently evaluating the impact of this standard on its consolidated financial statements and disclosures |  |  |  |
Accounting Standards Update 2023-03 [Member] |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Description of new accounting pronouncements |  |  | In July 2023, the FASB issued ASU 2023-03, Presentation of Financial Statements (Topic 205), Income Statement – Reporting Comprehensive Income (Topic 220), Distinguishing Liabilities from Equity (Topic 480), Equity (Topic 505), and Compensation – Stock Compensation (Topic 718). This ASU amends various paragraphs in the accounting codification pursuant to the issuance of Commission Staff Accounting Bulletin (SAB) number 120. The ASU provides clarifying guidance related to employee and non-employee share-based payment accounting, including guidance related to spring-loaded awards. ASU 2023-03 is effective upon issuance. The adoption of this guidance upon issuance did not have a material impact on the Company’s consolidated financial statements and disclosures. |  |  |  |
Accounting Standards Update 2023-06 [Member] |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Description of new accounting pronouncements |  |  | In October 2023, the FASB issued ASU 2023-06, Disclosure Improvements: Codification Amendments in Response to the SEC’s Disclosure Update and Simplification Initiative. This ASU amends certain disclosure and presentation requirements for a variety of topics within the FASB ASC. These amendments will also align the requirements in the ASC with the SEC's regulations. The effective date for each amended topic in the ASC is the date on which the SEC’s removal of the related disclosure requirement from Regulation S-X or Regulation S-K becomes effective, and will not be effective if the SEC has not removed the applicable disclosure requirements by June 30, 2027. Early adoption is prohibited. The Company is currently evaluating the impact of this standard on its consolidated financial statements and disclosures. |  |  |  |
Accounting Standards Update 2023-07 [Member] |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Description of new accounting pronouncements |  |  | In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. This ASU requires public entities to enhance disclosures about their reportable segments' significant expenses on an interim and annual basis. The new standard will become effective for the Company's annual disclosures beginning in fiscal year 2025 and for interim disclosures beginning in fiscal year 2026 on a retrospective basis. Early adoption is permitted. The Company is currently evaluating the impact of this standard on its consolidated financial statements and disclosures. |  |  |  |
Accounting Standards Update 2023-09 [Member] |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Description of new accounting pronouncements |  |  | In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. ASU 2023-09 enhances income tax disclosures by requiring disclosure of specific categories in the income tax rate reconciliation table and disaggregation of income taxes paid. The new standard will become effective for the Company beginning in fiscal year 2026. Early adoption is permitted and should be applied either prospectively or retrospectively. The Company is currently evaluating the impact of this standard on its consolidated financial statement disclosures. |  |  |  |
CPE Leased Equipment [Member] |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Property, equipment and satellites, cost | 585,205,000 |  | $ 585,205,000 |  |  | $ 395,427,000 |
Accumulated depreciation and amortization | 254,300,000 |  | $ 254,300,000 |  |  | 213,600,000 |
ViaSat-3 F1 satellite [Member] |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Maximum expected recovery % of the planned throughput |  |  | 10.00% |  |  |  |
Satellites [Member] |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Reduction to carrying value including capitalized interest | 1,600,000,000 |  | $ 1,600,000,000 |  |  |  |
Insurance claim receivables | 770,000,000 |  | 770,000,000 |  |  |  |
Satellites [Member] | Selling General and Administrative Expenses [Member] |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Satellite impairment loss, net, including liabilities associated with the termination of certain subcontractor agreements |  |  | 905,500,000 |  |  |  |
Unfavorable Regulatory Action [Member] |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Accrued reserves | 16,600,000 |  | 16,600,000 |  |  | 12,900,000 |
Indemnification Guarantee [Member] |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Accrued reserves | $ 0 |  | $ 0 |  |  | $ 0 |
Common Stock [Member] |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Shares issued in connection with acquisition of business, net of issuance costs , shares | shares |  |  | 46,363,636 |  |  |  |
Common stock issued based on the vesting terms of certain restricted stock unit agreements | shares | 1,284,326 | 1,236,257 | 1,478,822 | 1,324,658 |  |  |
Common Stock Held in Treasury [Member] |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |
Shares of common stock outstanding | shares | 0 |  | 0 |  |  | 0 |
Repurchase and immediate retirement of treasury shares pursuant to vesting of certain RSU agreements, shares | shares | 445,393 | 448,373 | 506,794 | 470,070 |  |  |
Repurchase and immediate retirement of treasury shares pursuant to vesting of certain RSU agreements | value | $ 8,700,000 | $ 15,100,000 | $ 11,200,000 | $ 15,900,000 |  |  |

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