Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Net revenues:
Product	$ 838,179	$ 861,935	$ 2,414,714	$ 2,630,803
Service	280,132	243,861	809,854	697,149
Total net revenues	1,118,311	1,105,796	3,224,568	3,327,952
Cost of revenues:
Product	334,645	286,609	907,863	844,746
Service	109,835	107,583	340,946	313,551
Total cost of revenues	444,480	394,192	1,248,809	1,158,297
Gross margin	673,831	711,604	1,975,759	2,169,655
Operating expenses:
Research and development	288,178	257,096	826,514	776,325
Sales and marketing	261,026	254,933	778,200	747,859
General and administrative	49,442	44,455	152,883	133,639
Amortization of purchased intangible assets	1,148	1,263	3,562	4,139
Restructuring and other charges	31,018	16,813	36,218	15,550
Acquisition-related and other charges	250	18	1,186	6,804
Total operating expenses	631,062	574,578	1,798,563	1,684,316
Operating income	42,769	137,026	177,196	485,339
Other expense, net	(3,956)	(15,957)	(25,617)	(36,107)
Income before income taxes and noncontrolling interest	38,813	121,069	151,579	449,232
Income tax provision	21,999	37,398	60,776	120,383
Consolidated net income	16,814	83,671	90,803	328,849
Adjust for net (income) loss attributable to noncontrolling interest	0	(8)	0	124
Net income attributable to Juniper Networks	16,814	83,663	90,803	328,973
Net income per share attributable to Juniper Networks common stockholders:
Basic	$ 0.03	$ 0.16	$ 0.17	$ 0.62
Diluted	$ 0.03	$ 0.16	$ 0.17	$ 0.60
Shares used in computing net income per share:
Basic	521,178	529,286	525,419	530,994
Diluted	524,537	536,583	530,343	544,086
Comprehensive income	$ 30,403	$ 67,425	$ 113,620	$ 324,756