Goodwill (Details) (USD $)	9 Months Ended
	Sep. 30, 2012	Dec. 31, 2011
Goodwill [Roll Forward]
Goodwill		$ 1,479,731,000
Accumulated impairment losses		(7,525,000)
Goodwill, net	1,475,928,000	1,472,206,000
Translation adjustments	3,722,000
Goodwill, net	1,475,928,000	1,472,206,000
Goodwill reclassified to assets of discontinued operations	1,600,000	17,300,000
Data and analytics [Member]
Goodwill [Roll Forward]
Goodwill		649,648,000
Accumulated impairment losses		(600,000)
Goodwill, net	652,770,000	649,048,000
Translation adjustments	3,722,000
Goodwill, net	652,770,000	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