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LONG-TERM OBLIGATIONS - NARRATIVE (Details)
₨ in Billions
3 Months Ended 6 Months Ended
Jun. 30, 2017
EUR (€)
Apr. 06, 2017
USD ($)
Apr. 06, 2017
EUR (€)
Feb. 15, 2017
USD ($)
Feb. 10, 2017
USD ($)
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Jun. 30, 2017
USD ($)
Jun. 30, 2016
USD ($)
Jun. 30, 2017
EUR (€)
Jun. 30, 2017
INR (₨)
Apr. 06, 2017
EUR (€)
Dec. 31, 2016
USD ($)
Debt Instrument [Line Items]                          
Long-term debt, stated interest rate (as a percent)           3.55%   3.55%   3.55% 3.55%    
Current portion of long-term obligations           $ 1,732,035,000   $ 1,732,035,000         $ 238,806,000
Borrowings under credit facilities               2,508,607,000 $ 1,397,672,000        
Loss on retirement of long-term obligations           274,000 $ (830,000) 55,714,000 (830,000)        
Prepayment consideration               61,764,000 $ 125,000        
Accrued interest           $ 154,926,000   154,926,000         157,297,000
2013 Credit Facility | Credit Facility                          
Debt Instrument [Line Items]                          
Borrowings under credit facilities               2,300,000,000          
Repayment of indebtedness under credit facility               2,000,000,000          
2014 Credit Facility | Credit Facility                          
Debt Instrument [Line Items]                          
Borrowings under credit facilities               200,000,000          
Repayment of indebtedness under credit facility               $ 405,000,000          
Senior notes                          
Debt Instrument [Line Items]                          
Maximum adjusted EBITDA           3.5   3.5   3.5 3.5    
Senior notes | 4.500% senior unsecured notes                          
Debt Instrument [Line Items]                          
Long-term debt           $ 999,301,000   $ 999,301,000         998,676,000
Long-term debt, stated interest rate (as a percent)           4.50%   4.50%   4.50% 4.50%    
Senior notes | 1.375% senior notes                          
Debt Instrument [Line Items]                          
Long-term debt           $ 559,995,000   $ 559,995,000         0
Long-term debt, stated interest rate (as a percent)   1.375%       1.375%   1.375%   1.375% 1.375% 1.375%  
Senior note public offering, amount   $ 532,200,000.0                   € 500,000,000.0  
Proceeds from issuance of unsecured debt   $ 521,400,000 € 489,800,000                    
Redemption price (as a percent)   100.00% 100.00%                    
Senior notes | 3.55% senior notes                          
Debt Instrument [Line Items]                          
Long-term debt           $ 742,503,000   $ 742,503,000         0
Long-term debt, stated interest rate (as a percent)           3.55%   3.55%   3.55% 3.55%    
Senior note public offering, amount | €                   € 750,000,000.0      
Proceeds from issuance of unsecured debt | € € 741,800,000.0                        
Redemption price (as a percent) 100.00%                        
Redemption price, change in control and corresponding ratings decline (as percent) 101.00%                        
Senior notes | 7.25% senior notes                          
Debt Instrument [Line Items]                          
Long-term debt           $ 0   $ 0         297,032,000
Long-term debt, stated interest rate (as a percent)         7.25% 7.25%   7.25%   7.25% 7.25%    
Loss on retirement of long-term obligations         $ 39,200,000                
Prepayment consideration         $ 36,300,000                
Percentage of principal amount redeemed         112.0854%                
Repayments of senior debt         $ 341,400,000                
Accrued interest         $ 5,100,000                
Secured debt | GTP Notes                          
Debt Instrument [Line Items]                          
Long-term debt           $ 0   $ 0         179,459,000
Repayments of indebtedness under the Term Loan       $ 173,500,000                  
Loss on retirement of long-term obligations       1,800,000                  
Prepayment consideration       7,200,000                  
Secured debt | Secured Cellular Site Revenue Notes                          
Debt Instrument [Line Items]                          
Long-term debt           0   0         132,960,000
Repayments of indebtedness under the Term Loan       129,000,000                  
Loss on retirement of long-term obligations       14,500,000                  
Prepayment consideration       $ 18,300,000                  
Viom Transaction                          
Debt Instrument [Line Items]                          
Current portion of long-term obligations           164,200,000   164,200,000     ₨ 10.6    
Secured Tower Revenue Securities, Series 2013-1A | Secured debt | Commercial Mortgage Pass Through Certificates Series 2013                          
Debt Instrument [Line Items]                          
Long-term debt           499,233,000   499,233,000         $ 498,642,000
Senior unsecured notes           $ 499,200,000   $ 499,200,000