v3.25.4

Senior Notes and Other Long-Term Debt - Components of Long-Term Debt (Detail) - USD ($) $ in Thousands | Dec. 31, 2025 | Mar. 31, 2025
--- | --- | ---
Debt Instrument [Line Items] |  |  |
Finance lease obligations (see Note 1) |  | $ 142,937 | $ 158,473
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration] |  | Other long-term debt | Other long-term debt
Total debt |  | $ 6,406,911 | $ 7,204,275
Unamortized discount, debt issuance costs and fair value adjustments made in purchase accounting |  | (126,420) | (168,166)
Less: current portion of long-term debt |  | 36,916 | 503,825
Total long-term debt |  | 6,243,575 | 6,532,284
2022 Term Loan Facility [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal amount of debt |  | 675,500 | 680,750
2023 Term Loan Facility [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal amount of debt |  | 602,824 | 607,450
Immarsat Original Term Loan Facility [ Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal amount of debt | [1] |  | 300,000
Inmarsat Term Loan Facility [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal amount of debt |  | 1,277,250 | 1,287,000
Former Ex-Im Credit Facility [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal amount of debt | [2] |  | 19,652
2025 Notes [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal amount of debt | [3] |  | 442,550
2027 Notes [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal amount of debt |  | 600,000 | 600,000
2028 Notes [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal amount of debt |  | 400,000 | 400,000
Inmarsat 2029 Notes [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal amount of debt |  | 1,975,000 | 1,975,000
2031 Notes [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Principal amount of debt |  | $ 733,400 | $ 733,400
[1] | O n November 21, 2025, the remaining borrowings under Inmarsat's original senior secured term loan facility (the Original Inmarsat Term Loan Facility) were repaid early in full.
[2] | On October 15, 2025, the Former Ex-Im Credit Facility was fully repaid at maturity.
[3] | On May 2, 2025, the 2025 Notes were redeemed in full.

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