XML 109 R90.htm IDEA: XBRL DOCUMENT v3.10.0.1
Debt - Bank Line of Credit and Term Loans (Details)
£ in Millions
1 Months Ended 12 Months Ended
Jul. 03, 2018
USD ($)
Jul. 03, 2018
GBP (£)
Oct. 19, 2017
renewal_option
Jun. 30, 2017
GBP (£)
Nov. 30, 2018
USD ($)
Mar. 31, 2017
GBP (£)
Jan. 31, 2015
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2018
GBP (£)
Debt Instrument [Line Items]                      
Bank line of credit               $ 80,103,000 $ 1,017,076,000    
Long-term debt               0 228,288,000    
Proceeds from bank debt               223,587,000 $ 5,395,000 $ 0  
Bank Line of Credit                      
Debt Instrument [Line Items]                      
Line of credit facility, maximum borrowing capacity               $ 2,000,000,000.0      
Number of extensions (in renewal options) | renewal_option     2                
Length of debt instrument extension period     6 months                
Loan, basis spread on variable rate               0.875%      
Debt instrument, facility fee (as a percent)               0.15%      
Line of credit facility additional aggregate amount, maximum               $ 750,000,000      
Bank line of credit               80,000,000      
Line of credit | £                     £ 55
Line of credit               $ 70,000,000      
Weighted-average interest rate (as a percent)               2.12%     2.12%
2012 Term Loan                      
Debt Instrument [Line Items]                      
Repayments of debt | £           £ 137          
2015 Term Loan                      
Debt Instrument [Line Items]                      
Repayments of debt   £ 169   £ 51 $ 224,000,000            
Proceeds from bank debt $ 224,000,000                    
Term of facility             4 years        
Term of contract             3 years        
2015 Term Loan | GBP LIBOR                      
Debt Instrument [Line Items]                      
Loan, basis spread on variable rate       1.15%              
Line of Credit and Term Loan                      
Debt Instrument [Line Items]                      
Debt instrument, covenant debt to assets (as a percent)               60.00%     60.00%
Debt instrument, covenant secured debt to assets (as a percent)               30.00%     30.00%
Debt instrument, covenant unsecured debt to unencumbered assets (as a percent)               60.00%     60.00%
Debt instrument, covenant minimum fixed charge coverage ratio               1.5     1.5
Debt instrument, covenant net worth               $ 6,500,000,000