XML 61 R49.htm IDEA: XBRL DOCUMENT v3.20.2
Supplemental Cash Flow Information (Detail) - USD ($)
 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2019
Jun. 30, 2019
Mar. 31, 2019
Open reverse repurchase commitments $ 0 $ 400,000,000.0     $ 0    
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability 48,500,000            
Operating Lease, Payments 66,600,000 61,200,000          
Income Taxes Paid 1,079,200,000 738,700,000          
Interest Paid, Including Capitalized Interest, Operating and Investing Activities 168,400,000 147,300,000          
Cash and Cash Equivalents | ARX Holding Corp.              
Open reverse repurchase commitments 77,200,000 62,800,000     46,300,000    
Common equities | Quarterly dividend [Member]              
Dividends payable $ 58,600,000 $ 58,500,000 $ 58,500,000 $ 58,500,000 $ 58,500,000 $ 58,400,000 $ 58,400,000