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Senior Notes and Other Long-Term Debt - Additional Information (Detail) |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |  |  |
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May 30, 2023 USD ($) | Mar. 31, 2023 USD ($) | Jun. 30, 2023 USD ($) Installment | Dec. 31, 2022 | Jun. 30, 2020 USD ($) | Oct. 31, 2019 USD ($) | Mar. 31, 2019 USD ($) | Sep. 30, 2017 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Percentage of Revolving Credit Commitment |  |  | 40.00% |  |  |  |  |
Bridge Facility [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Credit Facility maximum borrowing capacity | $ 733,400,000 |  |  |  |  |  |  |
Maturity date |  |  | May 30, 2024 |  |  |  |  |
Outstanding borrowings under the Credit Facility |  |  | $ 733,400,000 |  |  |  |  |
Principal amount of debt |  |  | $ 733,400,000 |  |  |  |  |
Credit Facility interest rate description |  |  | The initial bridge loan bears interest at a rate equal to the forward-looking term SOFR rate administered by CME for the applicable interest period, subject to a floor of 0.50%, plus a credit spread adjustment of 0.26% plus an applicable margin equal to (i) 4.75% from May 30, 2023 to (but excluding) August 30, 2023, (ii) 5.25% from August 30, 2023 to (but excluding) November 30, 2023, (iii) 5.75% from November 30, 2023 to (but excluding) February 29, 2024 and (iv) 6.25% from February 29, 2024 to (but excluding) May 30, 2024. The interest rate for the initial bridge loan is subject to a maximum total rate of 7.50% per annum. The Extended Term Loan, if applicable, will bear interest at a rate equal to 7.50% per annum. |  |  |  |  |
Effective interest rate | 7.50% |  | 7.83% |  |  |  |  |
Term Loan Facility [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Credit Facility maximum borrowing capacity |  |  | $ 700,000,000 |  |  |  |  |
Maturity date |  |  | Mar. 04, 2029 |  |  |  |  |
Outstanding borrowings under the Credit Facility |  |  | $ 693,000,000 |  |  |  |  |
Final installment, principal |  |  | $ 654,500,000 |  |  |  |  |
Debt instrument unamortized discount percentage |  |  | 2.00% |  |  |  |  |
Principal amount of debt |  | $ 694,750,000 | $ 693,000,000 |  |  |  |  |
Original issue discount |  |  | 14,000,000 |  |  |  |  |
Periodic installments, principal |  |  | $ 1,750,000 |  |  |  |  |
Line of Credit Facility, Date of First Required Payment |  |  | Sep. 30, 2022 |  |  |  |  |
Credit Facility interest rate description |  |  | Borrowings under the Term Loan Facility bear interest, at the Company’s option, at either (1) a base rate equal to the greater of the administrative agent’s prime rate as announced from time to time, the federal funds effective rate plus 0.50%, and the forward-looking term SOFR rate administered by CME for a one-month interest period plus 1.00%, subject to a floor of 1.50% for the initial term loans, plus an applicable margin of 3.50%, or (2) the forward-looking term SOFR rate administered by CME for the applicable interest period, subject to a floor of 0.50% for the initial term loans, plus an applicable margin of 4.50%. As of June 30, 2023, the effective interest rate on the Company’s outstanding borrowings under the Term Loan Facility was 10.14%. |  |  |  |  |
Credit facility description |  |  | The Term Loan Facility contains covenants that restrict, among other things, the ability of Company and its restricted subsidiaries to incur additional debt, grant liens, sell assets, make investments, pay dividends and make certain other restricted payments. |  |  |  |  |
Effective interest rate |  |  | 10.14% |  |  |  |  |
Bridge Facility Extended Term Loan [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Maturity date |  |  | May 30, 2031 |  |  |  |  |
2023 Term Loan Facility [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Credit Facility maximum borrowing capacity | $ 616,700,000 |  | $ 616,700,000 |  |  |  |  |
Maturity date |  |  | May 30, 2030 |  |  |  |  |
Outstanding borrowings under the Credit Facility |  |  | $ 616,700,000 |  |  |  |  |
Final installment, principal |  |  | $ 576,600,000 |  |  |  |  |
Debt instrument unamortized discount percentage |  |  | 2.50% |  |  |  |  |
Principal amount of debt |  |  | $ 616,700,000 |  |  |  |  |
Original issue discount |  |  | 15,400,000 |  |  |  |  |
Periodic installments, principal |  |  | $ 1,500,000 |  |  |  |  |
Line of Credit Facility, Date of First Required Payment |  |  | Dec. 31, 2023 |  |  |  |  |
Credit Facility interest rate description |  |  | Borrowings under the 2023 Term Loan Facility are required to be repaid in quarterly installments of $1.5 million each, commencing on December 31, 2023, followed by a final installment of $576.6 million at maturity. Borrowings under the 2023 Term Loan Facility bear interest, at the Company's option, at either (1) a base rate equal to the greater of the administrative agent’s prime rate as announced from time to time, the federal funds effective rate plus 0.50%, and the forward-looking term SOFR rate administered by CME for a one-month interest period plus 1.00%, subject to a floor of 1.50% for the initial term loans, plus an applicable margin of 3.50%, or (2) the forward-looking term SOFR rate administered by CME for the applicable interest period, subject to a floor of 0.50% for the initial term loans, plus an applicable margin of 4.50%, plus a credit spread adjustment ranging from 0.11% to 0.43%. As of June 30, 2023, the effective interest rate on the Company’s outstanding borrowings under the 2023 Term Loan Facility was 10.64% |  |  |  |  |
Credit facility description |  |  | The 2023 Term Loan Facility contains covenants that restrict, among other things, the ability of Company and its restricted subsidiaries to incur additional debt, grant liens, sell assets, make investments, pay dividends and make certain other restricted payments. |  |  |  |  |
Effective interest rate |  |  | 10.64% |  |  |  |  |
Inmarsat Term Loan Facility [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Maturity date |  |  | Dec. 12, 2026 |  |  |  |  |
Outstanding borrowings under the Credit Facility |  |  | $ 1,690,000,000 |  |  |  |  |
Periodic installments, principal |  |  | 4,400,000 |  |  |  |  |
Inmarsat Term Loan Facility [Member] | Inmarsat Holdings [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Principal amount of debt |  |  | 1,750,000,000 |  |  |  |  |
Inmarsat Secured Credit Facility [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Principal amount of debt |  |  | 1,693,125,000 |  |  |  |  |
Repayments of Lines of Credit |  |  | $ 280,000,000 |  |  |  |  |
Credit Facility interest rate description |  | Prior to June 30, 2023, borrowings under the Inmarsat Secured Credit Facility bore interest, at Inmarsat’s option, at either (1) the highest of the federal funds rate plus 0.50%, adjusted LIBOR plus 1.00%, or the administrative agent’s prime rate as announced from time to time, or (2) adjusted LIBOR, subject to a floor of 1.00% per annum, plus, in each case an applicable margin. As of June 30, 2023, the weighted average effective interest rate on the Company's outstanding borrowings under the Inmarsat Term Loan Facility was approximately 7.03%. | Following the transition, borrowings under the Inmarsat Secured Credit Facility now bear interest, at Inmarsat's option, at either (1) the highest of (x) the greater of the federal funds rate or the overnight banking fund rate for such day plus 0.50%, (y) the forward-looking one-month term SOFR rate plus 3.50% or (z) the administrative agent's prime rate as announced from time to time, or (2) the forward-looking term SOFR rate for the applicable interest period, subject to a floor of 1.00% per annum for the Inmarsat Term Loan Facility, plus, in each case an applicable margin. The applicable margin for the term loan is 2.50% per annum for base rate loans and 3.50% per annum for SOFR loans. The applicable margin for borrowings under the Inmarsat Revolving Credit Facility is based on Inmarsat’s senior secured first lien net leverage ratio. The Inmarsat Secured Credit Facility is required to be guaranteed by certain material Inmarsat subsidiaries and secured by substantially all of the assets of the Inmarsat borrowers and subsidiary guarantors. |  |  |  |  |
Credit facility description |  |  | The Inmarsat Secured Credit Facility contains covenants that restrict, among other things, Inmarsat’s ability to sell assets, make investments and acquisitions, make capital expenditures, grant liens, pay dividends and make certain other restricted payments. In addition, a financial covenant regarding Inmarsat’s senior secured first lien leverage ratio applies in the event borrowings under the Inmarsat Revolving Credit Facility exceed the greater of $280.0 million and 40% of the revolving credit commitment thereunder. The borrowers under the Inmarsat Secured Credit Facility were in compliance with the financial covenants under the Inmarsat Secured Credit Facility as of June 30, 2023 |  |  |  |  |
Inmarsat Revolving Credit Facility [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Maturity date |  |  | Dec. 12, 2024 |  |  |  |  |
Principal amount of debt |  |  | $ 700,000,000 |  |  |  |  |
Viasat Revolving Credit Facility [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Credit Facility maximum borrowing capacity |  |  | $ 700,000,000 |  |  |  |  |
Maturity date |  |  | Jan. 18, 2024 |  |  |  |  |
Outstanding borrowings under the Credit Facility |  |  | $ 0 |  |  |  |  |
Borrowing availability under the Credit Facility |  |  | $ 661,900,000 |  |  |  |  |
Credit Facility interest rate description |  |  | Borrowings under the Viasat Revolving Credit Facility bear interest, at the Company’s option, at either (1) the highest of the federal funds rate plus 0.50%, the Eurodollar rate plus 1.00%, or the administrative agent’s prime rate as announced from time to time, or (2) the Eurodollar rate, plus, in the case of each of (1) and (2), an applicable margin that is based on the Company’s total leverage ratio. |  |  |  |  |
Credit facility description |  |  | The Viasat Revolving Credit Facility contains financial covenants regarding a maximum total leverage ratio and a minimum interest coverage ratio. In addition, the Viasat Revolving Credit Facility contains covenants that restrict, among other things, the Company’s ability to sell assets, make investments and acquisitions, make capital expenditures, grant liens, pay dividends and make certain other restricted payments. The Company was in compliance with its financial covenants under the Viasat Revolving Credit Facility as of June 30, 2023. |  |  |  |  |
Revolving Extension Amendment Line of Credit [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-Term Line of Credit, Noncurrent | $ 512,500,000 |  |  |  |  |  |  |
Line of credit facility, expiration period | 5 years |  |  |  |  |  |  |
Ex-Im Credit Facility [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Credit Facility maximum borrowing capacity |  |  | $ 362,400,000 |  |  |  |  |
Outstanding borrowings under the Credit Facility |  |  | 49,100,000 |  |  |  |  |
Principal amount of debt |  | $ 58,957,000 | $ 49,130,000 |  |  |  |  |
Credit facility description |  |  | The Ex-Im Credit Facility contains financial covenants regarding Viasat’s maximum total leverage ratio and minimum interest coverage ratio. In addition, the Ex-Im Credit Facility contains covenants that restrict, among other things, the Company’s ability to sell assets, make investments and acquisitions, make capital expenditures, grant liens, pay dividends and make certain other restricted payments. |  |  |  |  |
Amount of qualified ViaSat-2 satellite costs limited to finance |  |  | $ 321,200,000 |  |  |  |  |
Percent of qualified ViaSat-2 expenses used to finance |  |  | 85.00% |  |  |  |  |
The maximum exposure fees under Ex-Im Credit Facility |  |  | $ 41,200,000 |  |  |  |  |
Interest rate on the outstanding borrowings |  |  | 2.38% |  |  |  |  |
Required number of installment repayments | Installment |  |  | 16 |  |  |  |  |
Debt maturity date |  |  | Oct. 15, 2025 |  |  |  |  |
Effective interest rate |  |  | 4.54% |  |  |  |  |
Ex-Im credit facility repayment commenced date |  |  | Apr. 15, 2018 |  |  |  |  |
Cumulative Ex-Im Credit Facility loan discount |  |  | $ 42,300,000 |  |  |  |  |
Exposure fees included in the principal |  |  | 35,300,000 |  |  |  |  |
The exposure fees paid under Ex-Im Credit Facility borrowings |  |  | 6,000,000 |  |  |  |  |
2028 Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Principal amount of debt |  | 400,000,000 | $ 400,000,000 |  |  |  |  |
Interest rate on the outstanding borrowings |  |  | 6.50% |  |  |  |  |
Principal amount of senior notes issued |  |  |  |  | $ 400,000,000 |  |  |
Debt maturity year |  |  | 2028 |  |  |  |  |
2028 Notes [Member] | Debt Instrument, Redemption, Other Period One [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Redemption price percentage of Senior Notes |  |  | 103.25% |  |  |  |  |
Redemption description of Senior Notes |  |  | in whole or in part, at any time during the 12 months beginning on July 15, 2023 at a redemption price of 103.250% |  |  |  |  |
2028 Notes [Member] | Debt Instrument, Redemption, Period One [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Redemption price percentage of Senior Notes |  |  | 101.625% |  |  |  |  |
Redemption description of Senior Notes |  |  | during the 12 months beginning on July 15, 2024 at a redemption price of 101.625% |  |  |  |  |
2028 Notes [Member] | Debt Instrument, Redemption, Period Two [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Redemption price percentage of Senior Notes |  |  | 100.00% |  |  |  |  |
Redemption description of Senior Notes |  |  | at any time on or after July 15, 2025 at a redemption price of 100%, in each case plus accrued and unpaid interest, if any, thereon to the redemption date. |  |  |  |  |
2028 Notes [Member] | Change of Control [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Redemption price percentage of Senior Notes |  |  | 101.00% |  |  |  |  |
Redemption description of Senior Notes |  |  | In the event a change of control triggering event occurs (as defined in the indenture governing the 2028 Notes), each holder will have the right to require the Company to repurchase all or any part of such holder’s 2028 Notes at a purchase price in cash equal to 101% of the aggregate principal amount of the 2028 Notes repurchased, plus accrued and unpaid interest, if any, to the date of purchase (subject to the right of holders of record on the relevant record date to receive interest due on the relevant interest payment date). |  |  |  |  |
2027 Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Principal amount of debt |  | 600,000,000 | $ 600,000,000 |  |  |  |  |
Interest rate on the outstanding borrowings |  |  | 5.625% |  |  |  |  |
Principal amount of senior notes issued |  |  |  |  |  |  | $ 600,000,000 |
Debt maturity year |  |  | 2027 |  |  |  |  |
2027 Notes [Member] | Debt Instrument, Redemption, Period Two [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Redemption description of Senior Notes |  |  | in whole or in part, at any time during the 12 months beginning on April 15, |  |  |  |  |
2027 Notes [Member] | Debt Instrument, Redemption, Period Four [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Redemption price percentage of Senior Notes |  |  | 100.00% |  |  |  |  |
Redemption description of Senior Notes |  |  | at any time on or after April 15, 2024 at a redemption price of 100%, in each case plus accrued and unpaid interest, if any, thereon to the redemption date. |  |  |  |  |
2027 Notes [Member] | Debt Instrument, Redemption, Period Three [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Redemption price percentage of Senior Notes |  |  | 101.406% |  |  |  |  |
Redemption description of Senior Notes |  |  | 2023 at a redemption price of 101.406% |  |  |  |  |
2027 Notes [Member] | Change of Control [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Redemption price percentage of Senior Notes |  |  | 101.00% |  |  |  |  |
Redemption description of Senior Notes |  |  | In the event a change of control triggering event occurs (as defined in the indenture governing the 2027 Notes), each holder will have the right to require the Company to repurchase all or any part of such holder’s 2027 Notes at a purchase price in cash equal to 101% of the aggregate principal amount of the 2027 Notes repurchased, plus accrued and unpaid interest, if any, to the date of purchase (subject to the right of holders of record on the relevant record date to receive interest due on the relevant interest payment date). |  |  |  |  |
2026 Notes [Member] | Debt Instrument, Redemption, Period Three [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Redemption price percentage of Senior Notes |  |  | 101.688% |  |  |  |  |
Inmarsat Senior Secured Notes 2026 [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Interest rate on the outstanding borrowings |  |  |  |  |  | 6.75% |  |
Principal amount of senior notes issued |  |  |  |  |  | $ 2,080,000,000.00 |  |
Debt maturity year |  |  | 2026 |  |  |  |  |
Redemption price percentage of Senior Notes |  |  | 100.00% |  |  |  |  |
Redemption description of Senior Notes |  |  | and at any time on or after October 1, 2024 at a redemption price of 100%, in each case, plus accrued and unpaid interest, if any, thereon to the redemption date. |  |  |  |  |
Inmarsat Senior Secured Notes 2026 [Member] | Debt Instrument, Redemption, Period Two [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Redemption price percentage of Senior Notes |  |  | 103.375% |  |  |  |  |
Redemption description of Senior Notes |  |  | in whole or in part, at any time during the 12 months beginning on October 1, 2022 at a redemption price of 103.375% |  |  |  |  |
Inmarsat Senior Secured Notes 2026 [Member] | Debt Instrument, Redemption, Period Three [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Redemption description of Senior Notes |  |  | during the 12 months beginning on October 1, 2023 at a redemption price of 101.688% |  |  |  |  |
Inmarsat Senior Secured Notes 2026 [Member] | Change of Control [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Redemption price percentage of Senior Notes |  |  | 101.00% |  |  |  |  |
Redemption description of Senior Notes |  |  | In the event a change of control occurs (as defined in the indenture governing the Inmarsat 2026 Notes), each holder will have the right to require Inmarsat to repurchase all or any part of such holder’s Inmarsat 2026 Notes at a purchase price in cash equal to 101% of the aggregate principal amount of the Inmarsat 2026 Notes repurchased, plus accrued and unpaid interest, if any, to the date of purchase (subject to the right of holders of record on the relevant record date to receive interest due on the relevant interest payment date). |  |  |  |  |
2025 Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Principal amount of debt |  | $ 700,000,000 | $ 700,000,000 |  |  |  |  |
Interest rate on the outstanding borrowings |  |  | 5.625% |  |  |  |  |
Principal amount of senior notes issued |  |  |  |  |  |  |  | $ 700,000,000
Debt maturity year |  |  | 2025 |  |  |  |  |
2025 Notes [Member] | Debt Instrument, Redemption, Period One [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Redemption description of Senior Notes |  |  | in whole or in part, at any time at a redemption price of 100%, plus accrued and unpaid interest, if any, thereon to the redemption date. |  |  |  |  |
2025 Notes [Member] | Debt Instrument, Redemption, Period Two [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Redemption price percentage of Senior Notes |  |  |  | 100.00% |  |  |  |
Redemption description of Senior Notes |  |  | at a redemption price of 100% |  |  |  |  |
2025 Notes [Member] | Change of Control [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Redemption price percentage of Senior Notes |  |  | 101.00% |  |  |  |  |
Redemption description of Senior Notes |  |  | In the event a change of control triggering event occurs (as defined in the indenture governing the 2025 Notes), each holder will have the right to require the Company to repurchase all or any part of such holder’s 2025 Notes at a purchase price in cash equal to 101% of the aggregate principal amount of the 2025 Notes repurchased, plus accrued and unpaid interest, if any, to the date of purchase (subject to the right of holders of record on the relevant record date to receive interest due on the relevant interest payment date).Inmarsat Senior Secured Notes due 2026In October 2019, certain subsidiaries of Inmarsat Holdings issued $2.08 billion in principal amount of Inmarsat 2026 Notes in a private placement to institutional buyers. The Inmarsat 2026 Notes bear interest at the rate of 6.750% per year, payable semi-annually in cash in arrears. Debt issuance costs associated with the issuance of the Inmarsat 2026 Notes are amortized to interest expense on a straight-line basis over the term of the Inmarsat 2026 Notes, the results of which are not materially different from the effective interest rate basis.The Inmarsat 2026 Notes are secured by pari passu first priority liens on the collateral securing the Inmarsat Secured Credit Facility, and are required to be guaranteed on a senior secured basis by restricted subsidiaries of Inmarsat Holdings that guarantee or are borrowers under Inmarsat’s senior secured indebtedness, subject to exceptions. As of June 30, 2023, all of the subsidiaries of Inmarsat Holdings that were then guarantors or borrowers under the Inmarsat Secured Credit Facility guaranteed the Inmarsat 2026 Notes. The indenture governing the Inmarsat 2026 Notes limits, among other things, the ability of the issuers and their restricted subsidiaries to: incur, assume or guarantee additional debt; issue redeemable stock and preferred stock; pay dividends, make distributions or redeem or repurchase capital stock; prepay, redeem or repurchase subordinated debt; make loans and investments; grant or incur liens; restrict dividends, loans or asset transfers from restricted subsidiaries; sell or otherwise dispose of assets; enter into transactions with affiliates; and consolidate or merge with, or sell substantially all of their assets to, another person.The Inmarsat 2026 Notes may be redeemed, in whole or in part, at any time during the 12 months beginning on October 1, 2022 at a redemption price of 103.375%, during the 12 months beginning on October 1, 2023 at a redemption price of 101.688%, and at any time on or after October 1, 2024 at a redemption price of 100%, in each case, plus accrued and unpaid interest, if any, thereon to the redemption date. In the event a change of control occurs (as defined in the indenture governing the Inmarsat 2026 Notes), each holder will have the right to require Inmarsat to repurchase all or any part of such holder’s Inmarsat 2026 Notes at a purchase price in cash equal to 101% of the aggregate principal amount of the Inmarsat 2026 Notes repurchased, plus accrued and unpaid interest, if any, to the date of purchase (subject to the right of holders of record on the relevant record date to receive interest due on the relevant interest payment date). The consummation of the Inmarsat Acquisition did not give rise to a “change of control” under the indenture governing the Inmarsat 2026 Notes. |  |  |  |  |
Letter of Credit [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Credit Facility maximum borrowing capacity |  |  | $ 150,000,000 |  |  |  |  |
Standby letters of credit outstanding amount |  |  | $ 38,100,000 |  |  |  |  |

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -SubTopic 10 -Topic 210 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 470 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481139/470-20-50-4 + Details
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Balance Type: | credit
Period Type: | instant

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- Definition The maximum percentage for a specific purpose other than for trade purchases that can be financed. + References No definition available. + Details
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Namespace Prefix: | vsat_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | duration

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- Definition The amount of exposure fees under the credit facility paid during the period. + References No definition available. + Details
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Namespace Prefix: | vsat_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility, excluding financing fees. + References No definition available. + Details
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Namespace Prefix: | vsat_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition The maximum amount of exposure fees that could be incurred under the Credit Facility. + References No definition available. + Details
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Namespace Prefix: | vsat_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Represents the required number of installments over which the borrowing must be repaid. + References No definition available. + Details
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Namespace Prefix: | vsat_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Percentage of revolving credit commitment. + References No definition available. + Details
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Namespace Prefix: | vsat_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
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- Details
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Namespace Prefix: |
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Balance Type: |
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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
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- Details
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Namespace Prefix: |
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Balance Type: |
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- Details
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Namespace Prefix: |
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Balance Type: |
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- Details
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Namespace Prefix: |
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Balance Type: |
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |