Goodwill (Details) (USD $)	6 Months Ended
	Jun. 30, 2012	Dec. 31, 2011
Goodwill [Roll Forward]
Goodwill		$ 1,479,731,000
Accumulated impairment losses		(7,525,000)
Goodwill, net	1,473,146,000	1,472,206,000
Translation adjustments	940,000
Goodwill, net	1,473,146,000	1,472,206,000
Disposal Group, Including Discontinued Operation, Goodwill	1,600,000	17,300,000
Data and Analytics [Member]
Goodwill [Roll Forward]
Goodwill		649,648,000
Accumulated impairment losses		(600,000)
Goodwill, net	649,988,000	649,048,000
Translation adjustments	940,000
Goodwill, net	649,988,000	649,048,000
Mortgage Origination Services [Member]
Goodwill [Roll Forward]
Goodwill		680,674,000
Accumulated impairment losses		(6,925,000)
Goodwill, net	673,749,000	673,749,000
Translation adjustments	0
Goodwill, net	673,749,000	673,749,000
Default Services [Member]
Goodwill [Roll Forward]
Goodwill		149,409,000
Accumulated impairment losses		0
Goodwill, net	149,409,000	149,409,000
Translation adjustments	0
Goodwill, net	$ 149,409,000	$ 149,409,000