Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2012 Class A Common Stock [Member]	Dec. 31, 2011 Class A Common Stock [Member]	Jun. 30, 2012 Class B Common Stock [Member]	Dec. 31, 2011 Class B Common Stock [Member]
ASSETS
Cash and cash equivalents	$ 2,076,900	$ 1,955,756
Short-term investments	3,269,969	2,556,450
Accounts receivable, net of allowance for doubtful accounts of $2,492 and $3,794	748,698	882,857
Deferred tax asset	151,704	128,471
Other current assets	127,528	80,439
Total current assets	6,436,453	5,677,772
Property and equipment, net	553,124	525,490
Capitalized software development costs, net and other	109,532	154,236
Deferred tax asset	172,190	156,855
Intangible assets, net	402,425	407,375
Goodwill	1,827,068	1,759,080
Total assets	9,500,792	8,680,808
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	77,026	49,747
Accrued expenses and other	590,268	587,650
Unearned revenues	1,850,681	1,764,109
Total current liabilities	2,517,975	2,401,506
Unearned revenues	1,091,709	944,309
Other liabilities	120,415	114,711
Total liabilities	4,180,099	3,910,526
Commitments and contingencies (see Note M)
Stockholders' equity:
Common stock, value			1,273	1,236	3,000	3,000
Additional paid-in capital	3,377,466	3,212,264
Accumulated other comprehensive income	3,183	1,176
Retained earnings	1,935,771	1,552,606
Total stockholders' equity	5,320,693	4,770,282
Total liabilities and stockholders' equity	$ 9,500,792	$ 8,680,808