Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 2,707,940	$ 2,910,420
Short-term investments	439,278	641,323
Accounts receivable, net of allowances	397,082	577,386
Deferred tax assets, net	229,374	154,310
Prepaid expenses and other current assets	168,625	156,222
Total current assets	3,942,299	4,439,661
Property and equipment, net	768,530	598,581
Long-term investments	900,769	740,659
Restricted cash and investments	102,661	78,307
Purchased intangible assets, net	118,655	123,114
Goodwill	3,987,073	3,928,144
Other long-term assets	140,607	75,354
Total assets	9,960,594	9,983,820
Current liabilities:
Accounts payable	224,242	324,843
Accrued compensation	230,102	223,018
Accrued warranty	29,776	28,276
Deferred revenue	771,709	712,663
Income taxes payable	66,996	12,545
Other accrued liabilities	178,976	165,358
Total current liabilities	1,501,801	1,466,703
Long-term debt	999,145	999,034
Long-term deferred revenue	221,217	254,364
Long-term income taxes payable	116,929	108,471
Other long-term liabilities	41,622	65,590
Total liabilities	2,880,714	2,894,162
Commitments and Contingencies
Juniper Networks stockholders' equity:
Convertible preferred stock, $0.00001 par value; 10,000 shares authorized; none issued and outstanding	0	0
Common stock, $0.00001 par value; 1,000,000 shares authorized; 515,332 shares and 526,409 shares issued and outstanding at September 30, 2012 and December 31, 2011, respectively	5	5
Additional paid-in capital	10,042,392	10,079,169
Accumulated other comprehensive income (loss)	5,227	(17,590)
Accumulated deficit	(2,968,220)	(2,972,402)
Total Juniper Networks stockholders' equity	7,079,404	7,089,182
Noncontrolling interest	476	476
Total stockholders' equity	7,079,880	7,089,658
Total liabilities and stockholders' equity	$ 9,960,594	$ 9,983,820