Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 2,249.9	$ 2,407.8
Short-term investments	542.9	441.5
Accounts receivable, net of allowances	509.1	438.4
Deferred tax assets, net	141.3	172.6
Prepaid expenses and other current assets	210.9	140.4
Total current assets	3,654.1	3,600.7
Property and equipment, net	855.3	811.9
Long-term investments	1,026.4	988.1
Restricted cash and investments	94.0	106.4
Purchased intangible assets, net	123.6	128.9
Goodwill	4,057.7	4,057.8
Other long-term assets	202.6	138.3
Total assets	10,013.7	9,832.1
Current liabilities:
Accounts payable	206.4	209.3
Accrued compensation	215.1	279.3
Accrued warranty	29.0	29.7
Deferred revenue	750.4	693.5
Other accrued liabilities	221.9	210.2
Total current liabilities	1,422.8	1,422.0
Long-term debt	999.3	999.2
Long-term deferred revenue	277.6	229.9
Long-term income taxes payable	115.7	112.4
Other long-term liabilities	80.7	69.1
Total liabilities	2,896.1	2,832.6
Commitments and contingencies
Juniper Networks stockholders' equity:
Convertible preferred stock, $0.00001 par value; 10.0 shares authorized; none issued and outstanding	0	0
Common stock, $0.00001 par value; 1,000.0 shares authorized; 505.6 shares and 508.4 shares issued and outstanding as of June 30, 2013 and December 31, 2012, respectively	0	0
Additional paid-in capital	9,899.5	9,905.7
Accumulated other comprehensive (loss) income	(3.7)	4.7
Accumulated deficit	(2,778.2)	(2,911.4)
Total Juniper Networks stockholders' equity	7,117.6	6,999.0
Noncontrolling interest	0	0.5
Total stockholders' equity	7,117.6	6,999.5
Total liabilities and stockholders' equity	$ 10,013.7	$ 9,832.1