Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 2,913,095	$ 2,910,420
Short-term investments	517,403	641,323
Accounts receivable, net of allowances	450,987	577,386
Deferred tax assets, net	168,214	154,310
Prepaid expenses and other current assets	181,319	156,222
Total current assets	4,231,018	4,439,661
Property and equipment, net	647,414	598,581
Long-term investments	785,285	740,659
Restricted cash and investments	82,504	78,307
Purchased intangible assets, net	152,541	123,114
Goodwill	3,987,707	3,928,144
Other long-term assets	58,554	75,354
Total assets	9,945,023	9,983,820
Current liabilities:
Accounts payable	195,420	324,843
Accrued compensation	209,263	223,018
Accrued warranty	29,276	28,276
Deferred revenue	760,621	712,663
Income taxes payable	2,566	12,545
Other accrued liabilities	163,610	165,358
Total current liabilities	1,360,756	1,466,703
Long-term debt	999,071	999,034
Long-term deferred revenue	238,964	254,364
Long-term income taxes payable	111,368	108,471
Other long-term liabilities	61,905	65,590
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; 529,177 shares and 526,409 shares issued and outstanding at March 31, 2012, and December 31, 2011, respectively	5	5
Additional paid-in capital	10,147,785	10,079,169
Accumulated other comprehensive loss	(712)	(17,590)
Accumulated deficit	(2,974,595)	(2,972,402)
Total Juniper Networks stockholders' equity	7,172,483	7,089,182
Noncontrolling interest	476	476
Total equity	7,172,959	7,089,658
Total liabilities and equity	$ 9,945,023	$ 9,983,820