Discontinued Operations (Details) (USD $)	3 Months Ended		9 Months Ended		1 Months Ended					3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011 Marketing Services Unit [Member] Total Impairment Charges [Member]	Sep. 30, 2011 Marketing Services Unit [Member] Impairment of Goodwill [Member]	Sep. 30, 2011 Marketing Services Unit [Member] Impairment of Intangible Assets [Member]	Sep. 30, 2011 Marketing Services Unit [Member] Allowance for Doubtful Accounts [Member]	Sep. 30, 2011 Marketing Services Unit [Member] Gain (Loss) on Disposition of Other Assets [Member]	Sep. 30, 2011 Discontinued Operations FAFC [Member]	Sep. 30, 2010 Discontinued Operations FAFC [Member]	Sep. 30, 2011 Discontinued Operations FAFC [Member]	Sep. 30, 2010 Discontinued Operations FAFC [Member]	Dec. 31, 2010 Discontinued Operations FAFC [Member]	Sep. 30, 2011 Discontinued Operations Employer And Litigation Services Businesses [Member]	Sep. 30, 2010 Discontinued Operations Employer And Litigation Services Businesses [Member]	Sep. 30, 2011 Discontinued Operations Employer And Litigation Services Businesses [Member]	Sep. 30, 2010 Discontinued Operations Employer And Litigation Services Businesses [Member]	Dec. 31, 2010 Discontinued Operations Employer And Litigation Services Businesses [Member]	Sep. 30, 2011 Data and Analytics [Member] Discontinued Operations Marketing [Member]	Sep. 30, 2010 Data and Analytics [Member] Discontinued Operations Marketing [Member]	Sep. 30, 2011 Data and Analytics [Member] Discontinued Operations Marketing [Member]	Sep. 30, 2010 Data and Analytics [Member] Discontinued Operations Marketing [Member]	Dec. 31, 2010 Data and Analytics [Member] Discontinued Operations Marketing [Member]	Sep. 30, 2011 Data and Analytics [Member] Discsontinued Operations Consumer [Member]	Sep. 30, 2010 Data and Analytics [Member] Discsontinued Operations Consumer [Member]	Sep. 30, 2011 Data and Analytics [Member] Discsontinued Operations Consumer [Member]	Sep. 30, 2010 Data and Analytics [Member] Discsontinued Operations Consumer [Member]	Dec. 31, 2010 Data and Analytics [Member] Discsontinued Operations Consumer [Member]	Sep. 30, 2011 Business and Information Services [Member] Discontinued Operations Transportation [Member]	Sep. 30, 2010 Business and Information Services [Member] Discontinued Operations Transportation [Member]	Sep. 30, 2011 Business and Information Services [Member] Discontinued Operations Transportation [Member]	Sep. 30, 2010 Business and Information Services [Member] Discontinued Operations Transportation [Member]	Dec. 31, 2010 Business and Information Services [Member] Discontinued Operations Transportation [Member]	Sep. 30, 2011 Business and Information Services [Member] Discontinued Operations Appraisal [Member]	Sep. 30, 2010 Business and Information Services [Member] Discontinued Operations Appraisal [Member]	Sep. 30, 2011 Business and Information Services [Member] Discontinued Operations Appraisal [Member]	Sep. 30, 2010 Business and Information Services [Member] Discontinued Operations Appraisal [Member]	Dec. 31, 2010 Business and Information Services [Member] Discontinued Operations Appraisal [Member]	Sep. 30, 2011 Components Total [Member]	Sep. 30, 2010 Components Total [Member]	Sep. 30, 2011 Components Total [Member]	Sep. 30, 2010 Components Total [Member]	Dec. 31, 2010 Components Total [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal Group, Not Discontinued Operation, Loss (Gain) on Write-down					$ 139,500,000	$ 123,300,000	$ 16,200,000	$ 8,900,000	$ 1,800,000
Income Statement [Abstract]
Discontinued Operation, Operating Revenue										0	0	0	1,490,501,000		0	64,383,000	0	172,063,000		6,431,000	12,873,000	29,399,000	33,325,000		22,877,000	22,255,000	73,443,000	68,143,000		16,838,000	17,119,000	51,448,000	51,908,000		12,463,000	37,527,000	60,012,000	110,479,000		58,609,000	154,157,000	214,302,000	1,926,419,000
Discontinued Operation, Income from Discontinued Operation, before Income Tax										0	0	0	76,323,000		0	(168,885,000)	0	(170,642,000)		(152,675,000)	(1,380,000)	(166,342,000)	(5,070,000)		(13,384,000)	3,493,000	(7,603,000)	8,874,000		157,000	411,000	1,210,000	3,100,000		(3,066,000)	2,777,000	(7,741,000)	8,859,000		(168,968,000)	(163,584,000)	(180,476,000)	(78,556,000)
Discontinued Operation, Tax (Expense) Benefit										0	0	0	33,222,000		0	(23,303,000)	0	(23,975,000)		(58,300,000)	(552,000)	(63,768,000)	(2,029,000)		(5,318,000)	1,397,000	(3,004,000)	3,549,000		58,000	164,000	479,000	1,240,000		(1,188,000)	1,111,000	(3,058,000)	3,544,000		(64,748,000)	(21,183,000)	(69,351,000)	15,551,000
Income/(loss), Net of Tax	(104,220,000)	(142,479,000)	(111,125,000)	(93,688,000)						0	0	0	43,101,000		0	(145,582,000)	0	(146,667,000)		(94,375,000)	(828,000)	(102,574,000)	(3,041,000)		(8,066,000)	2,096,000	(4,599,000)	5,325,000		99,000	247,000	731,000	1,860,000		(1,878,000)	1,666,000	(4,683,000)	5,315,000		(104,220,000)	(142,401,000)	(111,125,000)	(94,107,000)
Less: Net Income Attributable to Noncontrolling Interests										0	0	0	(419,000)		0	78,000	0	0		0	0	0	0		0	0	0	0		0	0	0	0		0	0	0	0		0	78,000	0	(419,000)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent	(104,220,000)	(142,479,000)	(111,125,000)	(93,688,000)						0	0	0	43,520,000		0	(145,660,000)	0	(146,667,000)		(94,375,000)	(828,000)	(102,574,000)	(3,041,000)		(8,066,000)	2,096,000	(4,599,000)	5,325,000		99,000	247,000	731,000	1,860,000		(1,878,000)	1,666,000	(4,683,000)	5,315,000		(104,220,000)	(142,479,000)	(111,125,000)	(93,688,000)
Statement of Financial Position [Abstract]
Disposal Group, Including Discontinued Operation, Other Current Assets										0		0		0	0		0		0	7,347,000		7,347,000		23,393,000	15,144,000		15,144,000		17,674,000	12,225,000		12,225,000		19,594,000	2,025,000		2,025,000		8,911,000	36,741,000		36,741,000		69,572,000
Disposal Group, Including Discontinued Operation, Property, Plant, and Equipment, Net										0		0		0	0		0		0	0		0		980,000	974,000		974,000		9,275,000	2,095,000		2,095,000		2,085,000	1,053,000		1,053,000		1,683,000	4,122,000		4,122,000		14,023,000
Disposal Group, Including Discontinued Operation, Goodwill Intangibles and Other Intangibles										0		0		0	0		0		0	0		0		142,792,000	4,709,000		4,709,000		4,996,000	7,551,000		7,551,000		7,825,000	22,252,000		22,252,000		22,330,000	34,512,000		34,512,000		177,943,000
Disposal Group, Including Discontinued Operation, Other Assets										0		0		0	0		0		0	0		0		0	331,000		331,000		331,000	213,000		213,000		213,000	192,000		192,000		193,000	736,000		736,000		737,000
Assets of Disposal Group, Including Discontinued Operation										0		0		0	0		0		0	7,347,000		7,347,000		167,165,000	21,158,000		21,158,000		32,276,000	22,084,000		22,084,000		29,717,000	25,522,000		25,522,000		33,117,000	76,111,000		76,111,000		262,275,000
Liabilities of Disposal Group, Including Discontinued Operation										$ 0		$ 0		$ 0	$ 0		$ 0		$ 0	$ 14,046,000		$ 14,046,000		$ 11,440,000	$ 12,232,000		$ 12,232,000		$ 9,386,000	$ 7,654,000		$ 7,654,000		$ 7,332,000	$ 8,573,000		$ 8,573,000		$ 12,004,000	$ 42,505,000		$ 42,505,000		$ 40,162,000