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.

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

Senior Notes and Other Long-Term Debt - Additional Information (Detail)			3 Months Ended	6 Months Ended
	Sep. 28, 2023 USD ($)	May 30, 2023 USD ($)	Mar. 31, 2023 USD ($)	Sep. 30, 2023 USD ($) Installment	Sep. 06, 2023 USD ($)	Aug. 31, 2023 USD ($)	Mar. 31, 2022 USD ($)	Jun. 30, 2020 USD ($)	Oct. 31, 2019 USD ($)	Mar. 31, 2019 USD ($)	Sep. 30, 2017 USD ($)
Bridge Facility [Member]
Debt Instrument [Line Items]
Credit Facility maximum borrowing capacity		$ 733,400,000
Maturity date		May 30, 2024
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				$ 691,300,000
Final installment, principal				$ 654,500,000
Debt instrument unamortized discount percentage				2.00%
Principal amount of debt			$ 694,750,000	$ 691,250,000
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 September 30, 2023, the effective interest rate on the Company’s outstanding borrowings under the Term Loan Facility was 10.35%.
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				10.35%
2023 Term Loan Facility [Member]
Debt Instrument [Line Items]
Credit Facility maximum borrowing capacity		$ 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 September 30, 2023, the effective interest rate on the Company’s outstanding borrowings under the 2023 Term Loan Facility was 10.91%.
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				10.91%
Inmarsat Term Loan Facility [Member]
Debt Instrument [Line Items]
Maturity date				Dec. 12, 2026
Outstanding borrowings under the Credit Facility				$ 1,690,000,000
Principal amount of debt				1,688,750,000
Periodic installments, principal				$ 4,400,000
Inmarsat Secured Credit Facility [Member]