Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 2,910,420	$ 1,811,887
Short-term investments	641,323	474,514
Accounts receivable, net of allowances	577,386	596,622
Deferred tax assets, net	154,310	161,535
Prepaid expenses and other current assets	156,222	169,812
Total current assets	4,439,661	3,214,370
Property and equipment, net	598,581	493,881
Long-term investments	740,659	535,178
Restricted cash and investments	78,307	119,346
Purchased intangible assets, net	123,114	121,803
Goodwill	3,928,144	3,927,807
Other long-term assets	75,354	55,466
Total assets	9,983,820	8,467,851
Current liabilities:
Accounts payable	324,843	292,270
Accrued compensation	223,018	256,746
Deferred revenue	712,663	660,264
Income taxes payable	12,545	25,000
Other accrued liabilities	193,634	237,696
Total current liabilities	1,466,703	1,471,976
Long-term debt	999,034	0
Long-term deferred revenue	254,364	224,165
Long-term income taxes payable	108,471	103,823
Other long-term liabilities	65,590	59,087
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; 526,409 shares and 525,378 shares issued and outstanding at December 31, 2011, and 2010, respectively	5	5
Additional paid-in capital	10,079,169	9,717,783
Accumulated other comprehensive loss	(17,590)	(1,251)
Accumulated deficit	(2,972,402)	(3,108,337)
Total Juniper Networks stockholders' equity	7,089,182	6,608,200
Noncontrolling interest	476	600
Total equity	7,089,658	6,608,800
Total liabilities and equity	$ 9,983,820	$ 8,467,851