Condensed Consolidated Statements Of Financial Position (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Dec. 31, 2013
Assets
Cash and cash equivalents	$ 2,617,619		$ 2,213,006
Short-term investments	2,000,860		1,534,467
Trade accounts receivable, net of allowances of $29,415 and $26,824, respectively	1,809,038		1,648,785
Unbilled accounts receivable	338,093		226,487
Deferred income tax assets, net	259,474		256,230
Other current assets	234,942		268,907
Total current assets	7,260,026		6,147,882
Property and equipment, net of accumulated depreciation of $807,865 and $719,336, respectively	1,101,468	[1]	1,081,164	[1]
Goodwill	437,776		444,236
Intangible assets, net	109,692		131,274
Deferred income tax assets, net	142,733		147,149
Other noncurrent assets	175,348		183,013
Total assets	9,227,043		8,134,718
Liabilities and Stockholders' Equity
Accounts payable	130,040		113,394
Deferred revenue	169,385		182,893
Accrued Liabilities and Other Liabilities	1,442,039		1,478,221
Total current liabilities	1,741,464		1,774,508
Deferred income tax liabilities, net	18,041		21,170
Other noncurrent liabilities	85,828		203,249
Total liabilities	1,845,333		1,998,927
Commitments and contingencies
Stockholders' Equity:
Preferred stock, $0.10 par value, 15,000 shares authorized, none issued	0		0
Class A common stock, $0.01 par value, 1,000,000 shares authorized, 608,911 and 607,729 shares issued and outstanding at September 30, 2014 and December 31, 2013, respectively	6,089		6,077
Additional paid-in capital	560,502		543,606
Retained earnings	6,938,777		5,862,367
Accumulated other comprehensive income (loss)	(123,658)		(276,259)
Total stockholders’ equity	7,381,710		6,135,791
Total liabilities and stockholders’ equity	$ 9,227,043		$ 8,134,718

[1] Long-lived assets include property and equipment, net of accumulated depreciation and amortization.