Annual report pursuant to Section 13 and 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)

v3.10.0.1
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details)
shares in Millions, $ in Billions
 3 Months Ended 12 Months Ended
Mar. 31, 2016
USD ($)
Dec. 31, 2018
USD ($)
segment
shares
Dec. 31, 2017
USD ($)
shares
Dec. 31, 2016
USD ($)
shares
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        
Contract assets   $ 7,300,000        
Contract liability   0        
Advertising costs from continuing operations   43,100,000 $ 54,600,000 $ 63,600,000    
Bad debt expense   5,600,000 5,000,000 2,200,000    
Depreciation and amortization   315,900,000 290,900,000 268,700,000    
Fixed assets, pledged as collateral   156,400,000 156,400,000      
Goodwill and intangible asset impairment   0 0 0    
Foreign currency transaction loss   1,600,000 500,000 8,800,000    
Fair value of debt   2,600,000,000 2,100,000,000      
Long term debt carrying amount   2,600,000,000 2,100,000,000      
Variable interest entity, maximum exposure to loss   $ 16,400,000        
Variable interest entity, ownership percentage   75.00%        
Redemption premium   $ 0        
Impact of Tax Cuts and Jobs Act of 2017     0      
Selling, general and administrative expenses   (1,213,300,000) (1,032,000,000) (941,000,000)    
Other income (expense), net   11,800,000 7,700,000 (4,800,000)    
Accounting Standards Update 2017-07            
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]            
Selling, general and administrative expenses   (4,000,000) (7,100,000) (7,200,000)    
Other income (expense), net   9,200,000 7,100,000 7,200,000    
Foreign Exchange Option            
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]            
Foreign currency option, weighted average strike price         0.7091 0.7225
Derivative, notional amount         $ 1.0 $ 1.0
Derivative, gain on derivative       4,700,000    
Derivative, loss on derivative $ 15,400,000          
Property and Equipment            
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]            
Depreciation and amortization   $ 157,600,000 115,600,000 $ 88,900,000    
Minimum | Computer Software Intangible Asset            
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]            
Property, plant and equipment useful life   3 years        
Maximum | Computer Software Intangible Asset            
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        
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        
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 | Minimum            
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]            
Property, plant and equipment useful life   3 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 Current Assets            
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]            
Income taxes receivable, current   $ 69,400,000 54,200,000      
Restricted cash   31,000,000 21,400,000      
Other Current Liabilities            
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]            
Restricted cash   $ 31,000,000 $ 21,400,000      
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   0.7 0.3 0.1    
U.S. Information Solutions            
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]            
Percentage of revenue from a segment   37.00%        
Retained Earnings            
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]            
Impact of Tax Cuts and Jobs Act of 2017     $ 50,000,000      
Cybersecurity Incident            
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]            
Insurance settlements receivable   $ 0 $ 35,000,000      
Other Income            
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]            
Foreign currency transaction loss   $ 1,800,000