Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jan. 31, 2014		Jan. 31, 2013
Current assets:
Cash and cash equivalents	$ 781,635		$ 747,245
Short-term marketable securities	57,139		120,376
Accounts receivable, net	1,360,837		872,634
Deferred commissions	171,461		142,311
Prepaid expenses and other current assets	309,180		133,314
Total current assets	2,680,252		2,015,880
Marketable securities, noncurrent	482,243		890,664
Property and equipment, net	1,240,746		604,669
Deferred commissions, noncurrent	153,459		112,082
Capitalized software, net	481,917		207,323
Goodwill	3,500,823		1,529,378
Other assets, net	613,490		168,960
Total assets	9,152,930		5,528,956
Current liabilities:
Accounts payable, accrued expenses and other liabilities	934,324		597,706
Deferred revenue	2,473,705		1,798,640
Convertible 0.75% senior notes, net	542,159		521,278
Term loan, current	30,000		0
Total current liabilities	3,980,188		2,917,624
Convertible 0.25% senior notes, net	1,046,930		0
Term loan, noncurrent	255,000		0
Deferred revenue, noncurrent	48,410		64,355
Other noncurrent liabilities	757,187		175,732
Total liabilities	6,087,715		3,157,711
Temporary equity	26,705		53,612
Commitments and contingencies (Note 10)
Stockholders' equity:
Preferred stock, $0.001 par value; 5,000 shares authorized and none issued and outstanding	0		0
Common stock, $0.001 par value; 1,600,000 shares authorized, 610,143 and 585,627 issued and outstanding at January 31, 2014 and 2013, respectively	610	[1]	586	[1]
Additional paid-in capital	3,363,377	[1]	2,410,892	[1]
Accumulated other comprehensive income	17,680		17,137
Accumulated deficit	(343,157)		(110,982)
Total stockholders' equity	3,038,510		2,317,633
Total liabilities, temporary equity and stockholders' equity	$ 9,152,930		$ 5,528,956

[1] Prior period results have been adjusted to reflect the four-for-one stock split through a stock dividend which occurred in April 2013.