Annual report pursuant to Section 13 and 15(d)

Segment Information (Detail)

v2.4.0.6
Segment Information (Detail) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Segment Reporting Disclosure [Line Items]                      
Operating revenue $ 558.10 $ 543.90 $ 535.80 $ 522.70 $ 509.70 $ 490.40 $ 487.10 $ 472.60 $ 2,160.50 $ 1,959.80 $ 1,859.50
Operating income 95.2 132.1 132.7 129.0 125.7 121.6 114.6 109.1 489.0 471.0 430.0
Total Assets 4,511.10       3,518.70       4,511.10 3,518.70  
Depreciation and amortization                 163.7 165.5 162.2
Capital expenditures                 66.0 75.0 99.8
US Consumer Information Solutions
                      
Segment Reporting Disclosure [Line Items]                      
Operating revenue                 916.80 792.60 743.00
Operating income                 341.7 287.3 269.8
Total Assets 2,010.50       1,025.60       2,010.50 1,025.60  
Depreciation and amortization                 41.7 44.1 41.4
Capital expenditures                 16.1 13.5 13.8
International
                      
Segment Reporting Disclosure [Line Items]                      
Operating revenue                 486.20 492.90 482.80
Operating income                 143.8 132.2 119.4
Total Assets 701.70       682.10       701.70 682.10  
Depreciation and amortization                 24.8 26.9 25.6
Capital expenditures                 10.7 15.8 12.4
Workforce Solutions
                      
Segment Reporting Disclosure [Line Items]                      
Operating revenue                 463.10 404.30 395.60
Operating income                 107.9 90.7 92.1
Total Assets 1,371.90       1,425.80       1,371.90 1,425.80  
Depreciation and amortization                 68.8 66.6 67.9
Capital expenditures                 12.8 23.4 16.5
North America Personal Solutions
                      
Segment Reporting Disclosure [Line Items]                      
Operating revenue                 204.50 180.70 157.60
Operating income                 61.6 54.1 44.6
Total Assets 23.70       22.90       23.70 22.90  
Depreciation and amortization                 7.0 6.0 5.4
Capital expenditures                 6.1 5.4 4.9
North America Commercial Solutions
                      
Segment Reporting Disclosure [Line Items]                      
Operating revenue                 89.90 89.30 80.50
Operating income                 19.8 23.6 19.5
Total Assets 64.20       65.30       64.20 65.30  
Depreciation and amortization                 4.7 5.1 6.2
Capital expenditures                 2.2 2.2 2.4
General Corporate Expense
                      
Segment Reporting Disclosure [Line Items]                      
Operating income                 (185.8) (116.9) (115.4)
Total Assets 339.10       297.00       339.10 297.00  
Depreciation and amortization                 16.7 16.8 15.7
Capital expenditures                 $ 18.1 $ 14.7 $ 49.8