Summary of Business and Significant Accounting Policies (Tables)

12 Months Ended

Jan. 31, 2017

Accounting Policies [Abstract]

Revenues By Geographical Region

Revenues by geographical region are as follows (in thousands):

	Fiscal Year Ended January 31,
	2017		2016		2015
Americas	$	6,224,971	$	4,910,745	$	3,868,329
Europe	1,373,547		1,162,808		984,919
Asia Pacific	793,466		593,663		520,338
	$	8,391,984	$	6,667,216	$	5,373,586

Schedule Of Property And Equipment Estimated Useful Lives

Property and equipment are stated at cost. Depreciation is calculated on a straight-line basis over the estimated useful lives of those assets as follows:

Computers, equipment and software	3 to 9 years
Furniture and fixtures	5 years
Leasehold improvements	Shorter of the estimated lease term or 10 years
Building and structural components	Average weighted useful life of 32 years
Building- leased facility	27 years
Building improvements	10 years