XML 46 R32.htm IDEA: XBRL DOCUMENT v3.8.0.1
Acquisitions and Equity Investments (Detail)
1 Months Ended 9 Months Ended
Apr. 03, 2017
USD ($)
Location
Nov. 30, 2017
USD ($)
Sep. 30, 2017
USD ($)
Store
Sep. 25, 2017
USD ($)
Sep. 22, 2017
USD ($)
Bridge Loan [Member]          
Business Acquisition [Line Items]          
Maximum borrowing capacity         $ 2,000,000,000.0
2017 Acquisitions [Member]          
Business Acquisition [Line Items]          
Payment to acquire companies and equity investments     $ 266,400,000    
Goodwill     105,400,000    
Inenco Group [Member]          
Business Acquisition [Line Items]          
Percentage of voting interests acquired 35.00%        
Payments to equity method investments $ 72,100,000        
Revenue reported by acquired entity for last annual period $ 325,000,000        
Number of locations of acquired entity | Location 161        
Percentage of voting interests with option to be acquired 65.00%        
Alliance Automotive Group [Member]          
Business Acquisition [Line Items]          
Revenue reported by acquired entity for last annual period     $ 1,700,000,000    
Number of stores | Store     1,800    
Alliance Automotive Group [Member] | Foreign Exchange Contract [Member] | Designated as Hedging Instrument [Member]          
Business Acquisition [Line Items]          
Derivative, notional amount       $ 1,000,000,000  
Alliance Automotive Group [Member] | Scenario, Forecast [Member]          
Business Acquisition [Line Items]          
Purchase price   $ 2,000,000,000