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Property and Equipment, Net - Components of Property and Equipment, Net (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
Property and Equipment, Net [Line Items]
Property and equipment, gross	$ 1,627,670	$ 1,497,541
Less accumulated depreciation	(1,019,719)	(972,227)
Property and equipment, net	607,951	525,314
Computers, Related Equipment and Software [Member]
Property and Equipment, Net [Line Items]
Property and equipment, gross	1,163,807	1,109,465
Building and Land [Member]
Property and Equipment, Net [Line Items]
Property and equipment, gross	177,255	109,446
Leasehold Improvements [Member]
Property and Equipment, Net [Line Items]
Property and equipment, gross	234,777	230,817
Furniture, Fixtures and Other [Member]
Property and Equipment, Net [Line Items]
Property and equipment, gross	$ 51,831	$ 47,813

X

- Definition

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

+ References

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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