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The Company and a Summary of Its Significant Accounting Policies - Additional Information (Detail 2) - USD ($) | 2 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
May 24, 2024 | Mar. 31, 2024 | Sep. 30, 2023 | Mar. 31, 2024 | Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2023
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Capitalized interest expense |  |  |  | $ 227,500,000 | $ 159,700,000 | $ 102,100,000 |  |
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. |  |  |  |  |
Insurance claim receivables |  | $ 261,500,000 |  | 261,500,000 |  |  |  |
Insurance recovery proceeds |  |  |  | 508,560,000 |  |  |  |
Capitalized costs, net, related to software developed for resale |  | 723,900,000 |  | 723,900,000 | 646,200,000 |  |  |
Gross capitalized implementation costs incurred in cloud computing arrangements |  | 63,600,000 |  | 63,600,000 | 38,000,000 |  |  |
Accumulated amortization related to capitalized software developed for resale |  | 483,300,000 |  | 483,300,000 | 424,000,000 |  |  |
Accumulated amortization related to capitalized implementation costs incurred in cloud computing arrangements |  | 9,500,000 |  | 9,500,000 | 5,300,000 |  |  |
Total capitalized costs related to patents |  | 3,900,000 |  | 3,900,000 | 3,700,000 |  |  |
Total capitalized costs related to orbital slots and other licenses |  | 117,000,000 |  | 117,000,000 | 77,000,000 |  |  |
Accumulated amortization of patents, orbital slots and other licenses |  | 8,400,000 |  | 8,400,000 | 6,800,000 |  |  |
Debt issuance costs capitalized |  |  |  | 53,900,000 | 0 | 7,800,000 |  |
Capitalized costs, net, related to software developed for resale |  | 240,597,000 |  | 240,597,000 | 222,155,000 |  |  |
Capitalized cost related to software development for resale |  |  |  | 77,500,000 | 59,400,000 |  |  |
Amortization expense of capitalized software development costs |  |  |  | 59,100,000 | 54,400,000 | 56,500,000 |  |
Amortization of capitalized implementation costs incurred in cloud computing arrangements |  |  |  | 4,200,000 | 4,200,000 |  |  |
Goodwill and other intangible assets impairment |  |  |  | 0 | 0 | $ 0 |  |
Self-insurance liability |  | $ 6,500,000 |  | 6,500,000 | $ 7,900,000 |  |  |
Revenue, practical expedient, financing component |  |  |  |  | true | true | true |
Revenue, practical expedient, incremental cost of obtaining contract [true false] |  |  |  |  | true | true | true |
Asset Impairment |  |  |  | $ 0 | $ 0 | $ 0 |  |
Minimum [Member] |  |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Property, equipment and satellites, estimated useful life (years) |  | 2 years |  | 2 years |  |  |  |
Expected capitalized software developed for resale over each of the next five fiscal years, estimated based on annual minimum straight-line amortization |  | $ 30,000,000 |  | $ 30,000,000 |  |  |  |
Estimated useful life, years |  | 2 years |  | 2 years |  |  |  |
Maximum [Member] |  |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Property, equipment and satellites, estimated useful life (years) |  | 38 years |  | 38 years |  |  |  |
Expected capitalized software developed for resale over each of the next five fiscal years, estimated based on annual minimum straight-line amortization |  | $ 60,000,000 |  | $ 60,000,000 |  |  |  |
Estimated useful life, years |  | 20 years |  | 20 years |  |  |  |
Maximum [Member] | Software Development Costs [Member] |  |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Estimated useful life, years |  | 5 years |  | 5 years |  |  |  |
Internally Developed Software [Member] | Minimum [Member] |  |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Property, equipment and satellites, estimated useful life (years) |  | 3 years |  | 3 years |  |  |  |
Internally Developed Software [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Property, equipment and satellites, estimated useful life (years) |  | 7 years |  | 7 years |  |  |  |
CPE Leased Equipment [Member] |  |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Property, equipment and satellites |  | $ 567,548,000 |  | $ 567,548,000 | 395,427,000 |  |  |
Accumulated depreciation and amortization |  | $ 267,400,000 |  | $ 267,400,000 | $ 213,600,000 |  |  |
CPE Leased Equipment [Member] | Minimum [Member] |  |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Property, equipment and satellites, estimated useful life (years) |  | 4 years |  | 4 years |  |  |  |
CPE Leased Equipment [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Property, equipment and satellites, estimated useful life (years) |  | 7 years |  | 7 years |  |  |  |
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 |  | $ 1,670,000,000 |  | $ 1,670,000,000 |  |  |  |
Insurance claim receivables |  |  |  |  |  |  |  | $ 770,000,000
Insurance recovery proceeds |  | $ 508,600,000 |  |  |  |  |  |
Satellites [Member] | Subsequent Event [Member] |  |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Insurance recovery proceeds | $ 75,000,000 |  |  |  |  |  |  |
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 |  |  |  |
Satellites [Member] | Minimum [Member] |  |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Property, equipment and satellites, estimated useful life (years) |  | 7 years |  | 7 years |  |  |  |
Satellites [Member] | Maximum [Member] |  |  |  |  |  |  |  |
Company And Summary Of Significant Accounting Policies [Line Items] |  |  |  |  |  |  |  |
Property, equipment and satellites, estimated useful life (years) |  | 17 years |  | 17 years |  |  |  |

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