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LONG-TERM DEBT AND LINES OF CREDIT - Narrative (Details)
3 Months Ended 6 Months Ended 12 Months Ended 14 Months Ended 26 Months Ended 50 Months Ended 59 Months Ended 71 Months Ended
Jun. 30, 2017
USD ($)
Rate
Jun. 30, 2016
USD ($)
Jun. 30, 2017
USD ($)
$ / shares
Rate
Jun. 30, 2016
USD ($)
Dec. 31, 2016
USD ($)
Jun. 30, 2018
USD ($)
Jun. 30, 2019
Jun. 30, 2021
Mar. 31, 2022
USD ($)
Mar. 31, 2023
Jun. 30, 2020
May 02, 2017
USD ($)
Debt Instrument [Line Items]                        
Debt instrument, face amount $ 95,279,000,000   $ 95,279,000,000   $ 187,274,000,000              
Other restrictions on payments of dividends (in USD per share) | $ / shares     $ 0.01                  
Interest expense 47,400,000 $ 37,500,000 $ 88,500,000 $ 51,000,000                
Secured Debt                        
Debt Instrument [Line Items]                        
Debt instrument, face amount                       $ 5,200,000,000.0
Secured Debt | Term Loan A                        
Debt Instrument [Line Items]                        
Debt instrument, face amount $ 1,500,000,000.0   $ 1,500,000,000.0                  
Credit facility interest rate (as a percentage) | Rate 2.98%   2.98%                  
Secured Debt | Term Loan A-2                        
Debt Instrument [Line Items]                        
Debt instrument, face amount $ 1,300,000,000.0   $ 1,300,000,000.0                  
Credit facility interest rate (as a percentage) | Rate 2.94%   2.94%                  
Secured Debt | Term Loan B-2                        
Debt Instrument [Line Items]                        
Debt instrument, face amount $ 1,200,000,000.0   $ 1,200,000,000.0                  
Credit facility interest rate (as a percentage) | Rate 3.23%   3.23%                  
Secured Debt | Revolving Credit Facility                        
Debt Instrument [Line Items]                        
Debt instrument, face amount $ 1,250,000,000.00   $ 1,250,000,000.00                  
Line of credit                        
Debt Instrument [Line Items]                        
Maximum borrowing capacity 687,400,000.0   687,400,000.0                  
Remaining borrowing capacity 817,900,000   817,900,000                  
Repayments of lines of credit     50,200,000   51,000,000              
Amount outstanding under lines of credit $ 318,300,000   $ 318,300,000   $ 392,100,000              
Short-term debt, weighted average interest rate 2.64%   2.64%   1.90%              
Average outstanding balance $ 311,600,000                      
Interest rate swap                        
Debt Instrument [Line Items]                        
Accumulated other comprehensive income related to interest rate     $ 3,000,000                  
Revolving Credit Facility | Fourth Amendment                        
Debt Instrument [Line Items]                        
Maximum leverage ratio 4.75   4.75                  
Minimum interest coverage ratio 2.25   2.25                  
Revolving Credit Facility | Secured Debt                        
Debt Instrument [Line Items]                        
Effective interest rate (as a percentage) | Rate 2.94%   2.94%                  
Revolving Credit Facility | Scenario, Forecast | Term Loan A                        
Debt Instrument [Line Items]                        
Percentage of quarterly installment payments             1.25% 1.875% 2.50%      
Revolving Credit Facility | Scenario, Forecast | Term Loan A-2                        
Debt Instrument [Line Items]                        
Periodic payment of debt           $ 1,700,000     $ 8,600,000      
Revolving Credit Facility | Scenario, Forecast | Term Loan B-2                        
Debt Instrument [Line Items]                        
Percentage of quarterly installment payments                   0.25%    
Revolving Credit Facility | Scenario, Forecast | Fourth Amendment                        
Debt Instrument [Line Items]                        
Maximum leverage ratio           4.50 4.25       4.00  
Letter of Credit | Line of credit                        
Debt Instrument [Line Items]                        
Maximum borrowing capacity $ 100,000,000   $ 100,000,000                  
Standby letters of credit | Line of credit                        
Debt Instrument [Line Items]                        
Remaining borrowing capacity $ 915,300,000   $ 915,300,000   $ 446,300,000              
Minimum | Revolving Credit Facility | Fourth Amendment                        
Debt Instrument [Line Items]                        
Commitment fee percentage     0.20%                  
Maximum | Revolving Credit Facility | Fourth Amendment                        
Debt Instrument [Line Items]                        
Commitment fee percentage     0.30%