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Goodwill and Acquired Intangible Assets - Allocation of Other Acquired Intangible Assets and Related Accumulated Amortization (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Useful Life | 11 years |
Other acquired intangible assets, gross | $ 2,917,299 | $ 346,525
Other acquired intangible assets, accumulated amortization | (372,832) | (145,320)
Other acquired intangible assets, net | $ 2,544,467 | 201,205
Contracts and Customer Relationships [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Useful Life | 11 years |
Other acquired intangible assets, gross | $ 1,437,738 | 132,563
Other acquired intangible assets, accumulated amortization | (148,271) | (34,202)
Other acquired intangible assets, net | $ 1,289,467 | 98,361
Orbital Slots And Spectrum Assets [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Useful Life | 12 years |
Other acquired intangible assets, gross | $ 1,088,600 | 8,600
Other acquired intangible assets, accumulated amortization | (83,600) | (8,600)
Other acquired intangible assets, net | $ 1,005,000 |
Technology [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Useful Life | 7 years |
Other acquired intangible assets, gross | $ 251,889 | 151,327
Other acquired intangible assets, accumulated amortization | (108,414) | (83,949)
Other acquired intangible assets, net | $ 143,475 | 67,378
Trade Names [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Useful Life | 8 years |
Other acquired intangible assets, gross | $ 117,280 | 32,253
Other acquired intangible assets, accumulated amortization | (24,770) | (12,657)
Other acquired intangible assets, net | $ 92,510 | 19,596
Other [Member] |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Weighted Average Useful Life | 11 years |
Other acquired intangible assets, gross | $ 21,792 | 21,782
Other acquired intangible assets, accumulated amortization | (7,777) | (5,912)
Other acquired intangible assets, net | $ 14,015 | $ 15,870

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