Annual report pursuant to Section 13 and 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Additional Information) (Details)

v3.6.0.2
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Additional Information) (Details)
AUD in Billions
 3 Months Ended 12 Months Ended
Feb. 04, 2015
shares
Oct. 24, 2014
USD ($)
shares
Mar. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2016
USD ($)
segment
shares
Dec. 31, 2015
USD ($)
shares
Dec. 31, 2014
USD ($)
shares
Jan. 31, 2016
USD ($)
Jan. 31, 2016
AUD
Dec. 31, 2015
AUD
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]                      
Number of reportable segments | segment           4          
Number of operating segments | segment           4          
Advertising costs from continuing operations           $ 63,600,000 $ 65,100,000 $ 57,100,000      
Bad debt expense           2,200,000 4,300,000 2,500,000      
Depreciation and amortization           268,700,000 200,000,000 204,200,000      
Fixed assets, pledged as collateral       $ 108,500,000   117,000,000 108,500,000        
Goodwill and intangible asset impairment           0 0 0      
Foreign currency transaction loss           8,800,000   7,000,000      
Foreign currency transaction gain             2,000,000        
Fair value of debt       1,200,000,000   2,400,000,000 1,200,000,000        
Ineffectiveness on fair value hedge               0      
Variable interest entity, maximum exposure to loss           $ 15,600,000          
Variable interest entity, ownership percentage           75.00%          
Variable interest entity, initial consolidation, gain (loss)           $ 0          
Redemption premium           0          
Additional paid in capital           35,900,000 30,000,000 17,700,000      
Excess tax benefits from stock-based compensation plans           35,900,000 30,000,000 17,700,000      
Long Term Debt Carrying Amount       1,100,000,000   2,400,000,000 1,100,000,000        
Additional Paid-In Capital                      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]                      
Additional paid in capital           $ 35,900,000 $ 30,000,000 $ 17,700,000      
Stock Options                      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]                      
Antidilutive stock options excluded from computation of earnings per share (in shares) | shares           100,000 100,000 100,000      
Foreign Exchange Option                      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]                      
Foreign currency option, weighted average strike price       0.7225     $ 0.7225   $ 0.7091    
Derivative, notional amount | AUD                   AUD 1.0 AUD 1.0
Derivative, gain on derivative       4,700,000              
Derivative asset       14,400,000     14,400,000        
Derivative, loss on derivative     $ 15,400,000                
Interest Rate Swap                      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]                      
Derivative, cash received on hedge         $ 3,800,000            
Data Processing Equipment Capitalized Internal Use Software and Systems Costs | Maximum                      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]                      
Property, plant and equipment useful life           10 years          
Data Processing Equipment Capitalized Internal Use Software and Systems Costs | Minimum                      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]                      
Property, plant and equipment useful life           3 years          
Building                      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]                      
Property, plant and equipment useful life           40 years          
Other Capitalized Property Plant and Equipment | Maximum                      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]                      
Property, plant and equipment useful life           7 years          
Other Capitalized Property Plant and Equipment | Minimum                      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]                      
Property, plant and equipment useful life           3 years          
Property and Equipment                      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]                      
Depreciation and amortization           $ 88,900,000 75,700,000 $ 71,700,000      
Computer Software Intangible Asset | Maximum                      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]                      
Property, plant and equipment useful life           10 years          
Computer Software Intangible Asset | Minimum                      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]                      
Property, plant and equipment useful life           3 years          
Other Current Assets                      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]                      
Restricted cash       30,200,000   $ 28,000,000 30,200,000        
Other Current Liabilities                      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]                      
Restricted cash       $ 30,200,000   $ 28,000,000 30,200,000        
Accelerated Share Repurchase Program                      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]                      
Stock repurchase program, settlement (payment) or receipt   $ 115,000,000                  
Treasury stock purchased under share repurchase program (in shares)) | shares 20,000 1,400,000                  
Treasury Stock, Holdback Provision, Percent   10.00%                  
Accelerated share repurchase program, adjustment   $ 11,500,000         $ (11,500,000)        
Stock repurchase program, number of shares authorized to be repurchased (in shares) | shares   3,200,000.0                  
U.S. Information Solutions                      
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]                      
Percentage of revenue from a segment           39.00%