Composition of Certain Balance Sheet Captions - Composition of Certain Balance Sheet Captions (Detail) - USD ($) $ in Thousands	Jun. 30, 2023	Mar. 31, 2023
Accounts receivable, net:
Accounts receivable, Billed	$ 513,517	$ 327,148
Accounts receivable, Unbilled	130,655	104,889
Allowance for doubtful accounts	(13,642)	(12,103)
Accounts receivable, net	630,530	419,934
Inventories:
Raw materials	111,303	68,655
Work in process	25,820	25,347
Finished goods	198,438	174,561
Inventories	335,561	268,563
Prepaid expenses and other current assets:
Prepaid expenses	175,414	115,701
Other	158,228	60,928
Prepaid expenses and other current assets	333,642	176,629
Property, equipment and satellites, net:
Property, equipment and satellites, gross	11,613,010	6,710,243
Less: accumulated depreciation and amortization	(2,450,119)	(2,331,960)
Property and equipment, net	9,162,891	4,378,283
Other acquired intangible assets, net:
Other acquired intangible assets, gross	2,720,504	346,525
Less: accumulated amortization	(174,374)	(145,320)
Other acquired intangible assets, net	2,546,130	201,205
Other assets:
Deferred income taxes	177,014	23,724
Capitalized software costs, net	223,847	222,155
Patents, orbital slots and other licenses, net	76,952	73,932
Other	249,592	146,227
Other assets	727,405	466,038
Accrued and other liabilities:
Collections in excess of revenues and deferred revenues	291,749	132,187
Accrued employee compensation	91,482	125,349
Accrued vacation	50,370	45,177
Operating lease liabilities	$ 66,340	$ 50,639
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Accrued and other liabilities	Accrued and other liabilities
Income taxes payable	$ 192,546	$ 113,905
Other	341,578	179,975
Accrued and other liabilities	1,034,065	647,232
Other liabilities:
Deferred revenues , long-term portion	1,040,119	84,747
Deferred income taxes, long-term	1,408,701	85,989
Other	363,272	47,806
Other liabilities	2,812,092	218,542
Contracts and Customer Relationships [Member]
Other acquired intangible assets, net:
Other acquired intangible assets, gross	1,068,425	132,563
Orbital Slots And Spectrum Assets [Member]
Other acquired intangible assets, net:
Other acquired intangible assets, gross	1,018,600	8,600
Technology [Member]
Other acquired intangible assets, net:
Other acquired intangible assets, gross	258,492	151,327
Trade Name [Member]
Other acquired intangible assets, net:
Other acquired intangible assets, gross	117,419	32,253
Other [Member]
Other acquired intangible assets, net:
Other acquired intangible assets, gross	257,568	21,782
Satellites [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	2,705,771	1,056,313
Satellites under Construction [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	3,689,340	2,252,908
Equipment and Software [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	3,109,932	1,917,243
CPE Leased Equipment [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, cost	609,183	395,427
Satellite Ka-band Capacity Obtained under Finance Leases [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	175,712	175,712
Furniture and Fixtures [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	64,035	58,807
Leasehold Improvements [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	180,112	151,827
Buildings [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	16,425	12,487
Land [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	29,434	3,873
Construction in Progress [Member]
Property, equipment and satellites, net:
Property, equipment and satellites, gross	$ 1,033,066	$ 685,646