v2.4.0.6
Guarantor And Non-Guarantor Supplemental Financial Information (Schedule Of Cash Flow Statement Information) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Operating activities:      
Net cash provided by operating activities from continuing operations $ 825,729 $ 605,387 $ 573,901
Investing activities:      
Capital expenditures, including internal-use software and website development (207,837) (136,376) (78,842)
Purchases of investments (1,723,350) (970,339) (45,903)
Sales and maturities of investments 1,507,240 366,036 93,092
Other, net (39,513) (3,668) 41,980
Net cash provided by (used in) investing activities from continuing operations (463,460) (744,347) 10,327
Financing activities:      
Proceeds from issuance of long-term debt, net of issuance costs   742,470  
Treasury stock activity (294,027) (501,993) (7,963)
Payment of dividends to stockholders (76,550) (79,076)  
Proceeds from exercise of equity awards 34,489 50,615 15,794
Credit facility repayments     (650,000)
Purchases of additional interest in controlled subsidiaries, net (22,485) (77,929)  
Other, net 39,568 44,388 (10,919)
Net cash provided by (used in) financing activities from continuing operations (353,494) 127,860 (660,919)
Net cash provided by (used in) continuing operations 8,775 (11,100) (76,691)
Net cash provided by operating activities from discontinued operations 204,343 172,096 102,103
Net cash provided by (used in) financing activities from discontinued operations (43,660) 4,021 587
Net cash provided by (used in) discontinued operations 76,903 40,999 21,181
Effect of exchange rate changes on cash and cash equivalents (17,743) (19,880) 9,279
Net increase (decrease) in cash and cash equivalents 67,935 10,019 (46,231)
Cash and cash equivalents at beginning of period 621,199 611,180 657,411
Cash and cash equivalents at end of period 689,134 621,199 611,180
Parent [Member]
      
Financing activities:      
Proceeds from issuance of long-term debt, net of issuance costs   742,470  
Treasury stock activity (294,027) (501,993)  
Payment of dividends to stockholders (76,550) (79,076)  
Transfers (to) from related parties 333,303 (219,556) (9,149)
Other, net 37,274 58,155 9,149
Guarantor Subsidiaries [Member]
      
Operating activities:      
Net cash provided by operating activities from continuing operations 527,448 378,370 556,357
Investing activities:      
Capital expenditures, including internal-use software and website development (179,159) (121,687) (64,573)
Purchases of investments (1,425,578) (846,344)  
Sales and maturities of investments 1,359,439 282,450  
Other, net (6,190) 14,938 49,339
Net cash provided by (used in) investing activities from continuing operations (251,488) (670,643) (15,234)
Financing activities:      
Credit facility repayments     (650,000)
Transfers (to) from related parties (333,303) 219,556 1,178
Other, net (4,285) (12,959) (10,800)
Net cash provided by (used in) financing activities from continuing operations (337,588) 206,597 (659,622)
Net cash provided by (used in) continuing operations (61,628) (85,676) (118,499)
Net cash provided by (used in) discontinued operations 76,903 40,999 21,181
Effect of exchange rate changes on cash and cash equivalents (19,539) (13,958) (22,050)
Net increase (decrease) in cash and cash equivalents (4,264) (58,635) (119,368)
Cash and cash equivalents at beginning of period 361,516 420,151 539,519
Cash and cash equivalents at end of period 357,252 361,516 420,151
Non-Guarantor Subsidiaries [Member]
      
Operating activities:      
Net cash provided by operating activities from continuing operations 298,281 227,017 17,544
Investing activities:      
Capital expenditures, including internal-use software and website development (28,678) (14,689) (14,269)
Purchases of investments (297,772) (123,995) (45,903)
Sales and maturities of investments 147,801 83,586 93,092
Other, net (33,323) (18,606) (7,359)
Net cash provided by (used in) investing activities from continuing operations (211,972) (73,704) 25,561
Financing activities:      
Purchases of additional interest in controlled subsidiaries, net (22,485) (77,929)  
Transfers (to) from related parties     7,971
Other, net 6,579 (808) (9,268)
Net cash provided by (used in) financing activities from continuing operations (15,906) (78,737) (1,297)
Net cash provided by (used in) continuing operations 70,403 74,576 41,808
Effect of exchange rate changes on cash and cash equivalents 1,796 (5,922) 31,329
Net increase (decrease) in cash and cash equivalents 72,199 68,654 73,137
Cash and cash equivalents at beginning of period 259,683 191,029 117,892
Cash and cash equivalents at end of period $ 331,882 $ 259,683 $ 191,029