XML 72 R55.htm IDEA: XBRL DOCUMENT v3.8.0.1
Income Taxes - Additional Information (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Taxes [Line Items]      
Document Period End Date Dec. 31, 2017    
Tax Cuts and Jobs Act o f2017 Incomplete Accounting Provisional Income Tax Expense (Benefit) $ 700.0    
Operating loss carryforwards 300.0    
Unrecognized tax benefits 1,180.4 $ 924.1 [1] $ 781.2
Reasonably possible amount of unrecognized tax benefits decrease within the next 12 months - minimum 710.0    
Effective tax rate adjustment 700.0    
Accrued interest and penalties related to income tax matters 155.3 117.0  
Provision for income taxes, interest and penalties expense related to tax matters 34.9 $ 41.7 $ 21.1
US net deferred tax liability remeasurement, amount 500.0    
Tax Cuts and Jobs Act of 2017 Transition Tax for Accumulated Foreign Earnings Liability, Noncurrent 1,200.0    
Minimum      
Income Taxes [Line Items]      
Effective tax rate adjustment 20.0    
Indefinite [Member]      
Income Taxes [Line Items]      
Operating loss carryforwards $ 200.0    
[1] Of this amount, $1,132.3 million and $890.0 million are included in Other long-term liabilities for 2017 and 2016, respectively, and $30.8 million and $9.0 million are included in Current liabilities - income taxes for 2017 and 2016, respectively, on the consolidated balance sheet. The remainder is included in Deferred income taxes on the consolidated balance sheet.