Condensed Consolidated Statements Of Cash Flows (USD $) In Thousands	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net income	$ 89,077	$ 874,359
Adjustments to reconcile net income to net cash provided by operating activities:
Net gain on sale of discontinued operations, net of tax		(735,491)
Depreciation of property and equipment and amortization of other intangible assets	41,455	53,379
Stock-based compensation	36,107	42,201
Excess tax benefit associated with stock-based compensation	(1,851)	(167,194)
Other, net	6,804	8,435
Changes in operating assets and liabilities, excluding the effects of acquisitions and divestitures:
Accounts receivable	(38)	11,154
Deferred tax assets and other assets	(12,434)	2,074
Accounts payable and accrued liabilities	(7,338)	8,607
Deferred revenues	59,905	70,955
Net cash provided by operating activities	211,687	168,479
Cash flows from investing activities:
Proceeds from maturities and sales of marketable securities and investments	543,503	239,680
Proceeds received from divestiture of businesses, net of cash contributed		1,165,030
Purchases of marketable securities and investments	(75,705)	(714,592)
Purchases of property and equipment	(63,444)	(68,646)
Other investing activities	(1,179)	(4,688)
Net cash provided by investing activities	403,175	616,784
Cash flows from financing activities:
Proceeds from issuance of common stock from option exercises and employee stock purchase plans	41,510	56,442
Repurchases of common stock	(548,803)	(434,234)
Payment of dividends to stockholders	(463,498)
Excess tax benefit associated with stock-based compensation	1,851	167,194
Other financing activities	(1,117)	(736)
Net cash used in financing activities	(970,057)	(211,334)
Effect of exchange rate changes on cash and cash equivalents	(1,645)	9,100
Net (decrease) increase in cash and cash equivalents	(356,840)	583,029
Cash and cash equivalents at beginning of period	1,559,628	1,477,166
Cash and cash equivalents at end of period	1,202,788	2,060,195
Supplemental cash flow disclosures:
Cash paid for interest, net of capitalized interest	$ 140,047	$ 39,628

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Includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the Entity may deposit additional funds at any time and also effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Compensating balance arrangements that do not legally restrict the withdrawal or usage of cash amounts may be reported as Cash and Cash Equivalents, while legally restricted deposits held as compensating balances against borrowing arrangements, contracts entered into with others, or company statements of intention with regard to particular deposits are not generally reported as cash and cash equivalents. Includes cash and cash equivalents associated with the entity's continuing operations. Excludes cash and cash equivalents associated with the disposal group (and discontinued operation).