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Debt and Other Obligations (Indebtedness) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2012
Debt Instrument [Line Items]              
Total debt and other obligations $ 20,629,000 $ 19,280,000          
Less: current maturities and short-term debt and other current obligations 72,000 129,000          
Non-current portion of long-term debt and other long-term obligations $ 20,557,000 19,151,000          
Minimum [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage 0.00%            
Maximum [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage 0.75%            
Collateral Pledged [Member]              
Debt Instrument [Line Items]              
Debt Instrument, PPE Collaterized Amount $ 855,000            
Maximum Downward Adjustment              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage 0.01%            
Target Maximum Upward Adjustment              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage 0.05%            
Maximum Downward Adjustment              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage 5.00%            
Secured Debt [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations $ 2,982,000 3,278,000          
Unsecured Debt [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations $ 17,647,000 16,002,000          
Minimum [Member] | Finance Lease Obligations and Other [Member]              
Debt Instrument [Line Items]              
Debt Instrument Maturity Date Range one year            
Maximum [Member] | Finance Lease Obligations and Other [Member]              
Debt Instrument [Line Items]              
Debt Instrument Maturity Date Range 25 years            
3.849% Secured Notes [Member] | Secured Debt [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations $ 998,000 997,000          
Debt Instrument, Interest Rate, Stated Percentage 3.90% [1]           3.849%
Debt Instrument, Face Amount             $ 1,000,000
Fixed Rate Debt 2009 Securitized Notes A-2 [Member] | Secured Debt [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations $ 53,000 60,000          
Debt Instrument, Interest Rate, Stated Percentage [1] 9.00%            
2015 Tower Revenue Notes 3.222% due 2042 [Member] | Secured Debt [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations [2],[3] $ 0 299,000          
Debt Instrument, Interest Rate, Stated Percentage     3.222%        
Debt Instrument, Face Amount           $ 300,000  
2018 Tower Revenue Notes 3.720% due 2043 [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Face Amount 250,000            
2018 Tower Revenue Notes 3.720% due 2043 [Member] | Secured Debt [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations [2],[3] $ 249,000 248,000          
Debt Instrument, Interest Rate, Stated Percentage 3.70% [1]   3.72%        
Debt Instrument, Face Amount     $ 250,000        
2015 Tower Revenue Notes 3.663% due 2045 [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Face Amount $ 700,000            
2015 Tower Revenue Notes 3.663% due 2045 [Member] | Secured Debt [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations [2],[3] $ 696,000 695,000          
Debt Instrument, Interest Rate, Stated Percentage 3.70% [1]   3.663%        
Debt Instrument, Face Amount           700,000  
2018 Tower Revenue Notes 4.241% due 2048 [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Face Amount $ 750,000            
2018 Tower Revenue Notes 4.241% due 2048 [Member] | Secured Debt [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations [2],[3] $ 744,000 743,000          
Debt Instrument, Interest Rate, Stated Percentage 4.20% [1]   4.241%        
Debt Instrument, Face Amount     $ 750,000        
Finance Lease Obligations and Other [Member] | Maximum [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage 10.00%            
2016 Term Loan A [Member] | Bank Debt [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations $ 1,222,000 $ 2,252,000          
Debt Instrument, Interest Rate, Stated Percentage [1],[4] 1.20%            
Debt Instrument, Face Amount         $ 2,000,000    
2016 Term Loan A [Member] | Bank Debt [Member] | Additional Principal Incurred [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Face Amount       $ 500,000      
Senior Unsecured 2016 Notes 3.40% [Member] | Bonds [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage   3.40%          
2.250% Senior Notes [Member] | Bonds [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage   2.25%          
4.875% Senior Notes [Member] | Bonds [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage   4.875%          
5.250% Senior Notes [Member] | Bonds [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations $ 0 $ 1,646,000          
Debt Instrument, Interest Rate, Stated Percentage 5.25%           5.25%
Debt Instrument, Face Amount             $ 1,650,000
3.150% Senior Notes [Member] | Bonds [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations $ 747,000 746,000          
Debt Instrument, Interest Rate, Stated Percentage 3.20% [1]     3.15%      
Debt Instrument, Face Amount       $ 750,000      
August 2017 Senior Unsecured 3.200% Notes [Member] | Bonds [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations $ 747,000 745,000          
Debt Instrument, Interest Rate, Stated Percentage 3.20% [1]       3.20%    
Debt Instrument, Face Amount         $ 750,000    
Senior Unsecured 2016 Notes 4.450% [Member] | Bonds [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations $ 895,000 894,000          
Debt Instrument, Interest Rate, Stated Percentage [1] 4.50%            
Senior Unsecured 2016 Notes 3.7% [Member] | Bonds [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations $ 746,000 745,000          
Debt Instrument, Interest Rate, Stated Percentage [1] 3.70%            
4.000% Senior Unsecured Notes [Member] | Bonds [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations $ 496,000 496,000          
Debt Instrument, Interest Rate, Stated Percentage 4.00% [1]       4.00%    
Debt Instrument, Face Amount         $ 500,000    
August 2017 Senior Unsecured 3.650% Notes [Member] | Bonds [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations $ 995,000 994,000          
Debt Instrument, Interest Rate, Stated Percentage 3.70% [1]       3.65%    
Debt Instrument, Face Amount         $ 1,000,000    
3.800% Senior Notes [Member] | Bonds [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations $ 992,000 991,000          
Debt Instrument, Interest Rate, Stated Percentage 3.80% [1]     3.80%      
Debt Instrument, Face Amount       $ 1,000,000      
February 2019 Senior Unsecured 4.300% Notes [Member] | Bonds [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations $ 593,000 593,000          
Debt Instrument, Interest Rate, Stated Percentage 4.30% [1]   4.30%        
Debt Instrument, Face Amount     $ 600,000        
August 2019 Senior Unsecured 3.100% Notes [Member] | Bonds [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations $ 545,000 544,000          
Debt Instrument, Interest Rate, Stated Percentage 3.10% [1]   3.10%        
Debt Instrument, Face Amount     $ 550,000        
4.750% Senior Unsecured Notes [Member] [Member] | Bonds [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations $ 344,000 344,000          
Debt Instrument, Interest Rate, Stated Percentage 4.80% [1]       4.75%    
Debt Instrument, Face Amount         $ 350,000    
February 2019 Senior Unsecured 5.200% Notes [Member] | Bonds [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations $ 395,000 395,000          
Debt Instrument, Interest Rate, Stated Percentage 5.20% [1]   5.20%        
Debt Instrument, Face Amount     $ 400,000        
August 2019 Senior Unsecured 4.000% Notes [Member] | Bonds [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations $ 345,000 345,000          
Debt Instrument, Interest Rate, Stated Percentage 4.00% [1]   4.00%        
Debt Instrument, Face Amount     $ 350,000        
Tower Revenue Notes [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Increase (Decrease) 5.00%            
Secured Debt [Member] | Finance Lease Obligations and Other [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations [5] $ 242,000 236,000          
June 2020 Senior Unsecured 1.350% Notes [Domain] | Bonds [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations $ 496,000 $ 494,000          
Debt Instrument, Interest Rate, Stated Percentage 1.40% [1] 1.35%          
Debt Instrument, Face Amount   $ 500,000          
April 2020 Senior Unsecured 3.300% Notes [Member] | Bonds [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations $ 738,000 $ 737,000          
Debt Instrument, Interest Rate, Stated Percentage 3.30% [1] 3.30%          
Debt Instrument, Face Amount   $ 750,000          
June 2020 Senior Unsecured 2.250% Notes [Domain] | Bonds [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations $ 1,089,000 $ 1,088,000          
Debt Instrument, Interest Rate, Stated Percentage 2.30% [1] 2.25%          
Debt Instrument, Face Amount   $ 1,100,000          
April 2020 Senior Unsecured 4.150% Notes [Member] | Bonds [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations $ 490,000 $ 489,000          
Debt Instrument, Interest Rate, Stated Percentage 4.20% [1] 4.15%          
Debt Instrument, Face Amount   $ 500,000          
June 2020 Senior Unsecured 3.250% Notes [Domain] | Bonds [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations $ 890,000 $ 889,000          
Debt Instrument, Interest Rate, Stated Percentage 3.30% [1] 3.25%          
Debt Instrument, Face Amount   $ 900,000          
2016 Revolver [Member] | Bank Debt [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage [1],[4] 1.20%            
Commercial Paper [Member] | Bank Debt [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage [1] 0.50%            
February 2021 Senior Unsecured 2.100% Notes [Domain] | Bonds [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations $ 988,000 0          
Debt Instrument, Interest Rate, Stated Percentage 2.10%            
June 2021 Senior Unsecured 2.500% Notes [Domain] | Bonds [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations $ 741,000 0          
Debt Instrument, Interest Rate, Stated Percentage 2.50%            
February 2021 Senior Unsecured 2.900% Notes [Domain] | Bonds [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations $ 1,233,000 0          
Debt Instrument, Interest Rate, Stated Percentage 2.90%            
February 2021 Senior Unsecured 1.050% Notes [Domain] | Bonds [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations $ 990,000 0          
Debt Instrument, Interest Rate, Stated Percentage 1.10%            
February 2021 Senior Notes [Domain] | Bonds [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Face Amount $ 3,250,000            
February 2021 Senior Unsecured 1.050% Notes [Member] | Bonds [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage 1.05%            
Debt Instrument, Face Amount $ 1,000,000            
February 2021 Senior Unsecured 2.100% Notes [Member] | Bonds [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage 2.10%            
Debt Instrument, Face Amount $ 1,000,000            
February 2021 Senior Unsecured 2.900% Notes | Bonds [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage 2.90%            
Debt Instrument, Face Amount $ 1,250,000            
June 2021 Senior Unsecured 2.500% Notes | Bonds [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage 2.50%            
Debt Instrument, Face Amount $ 750,000            
2016 Senior Unsecured Notes [Domain] | Bonds [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Face Amount           $ 1,500,000  
3.400% Senior Notes [Member] | Bonds [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage           3.40%  
Debt Instrument, Face Amount           $ 250,000  
3.400% Senior Notes [Member] | Bonds [Member] | February 2016 Senior Note Upsizing [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage           3.40%  
Debt Instrument, Face Amount           $ 600,000  
4.450% Senior Notes [Member] | Bonds [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage           4.45%  
Debt Instrument, Face Amount           $ 900,000  
May 2016 Senior Unsecured Notes [Member] | Bonds [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Face Amount           $ 1,000,000  
3.700% Senior Notes [Member] | Bonds [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage           3.70%  
Debt Instrument, Face Amount           $ 750,000  
Senior Unsecured 364-Day Revolving Credit Facility [Domain] | Bank Debt [Member]              
Debt Instrument [Line Items]              
Line of Credit Facility, Maximum Borrowing Capacity         1,000,000    
May 2015 Tower Revenue Notes [Member] | Secured Debt [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Face Amount           $ 1,000,000  
July 2018 Tower Revenue Notes [Member] | Secured Debt [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Face Amount     1,000,000        
2018 Tower Revenue Notes Risk Retention Tranche [Member] | Secured Debt [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Face Amount     53,000        
April 2020 Senior Notes [Domain] [Domain] | Bonds [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Face Amount   1,250,000          
June 2020 Senior Notes [Domain] | Bonds [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Face Amount   2,500,000          
February 2019 Senior Notes [Domain] | Bonds [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Face Amount     1,000,000        
August 2019 Senior Notes [Domain] | Bonds [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Face Amount     900,000        
August 2017 Senior Notes [Member] | Bonds [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Face Amount         1,750,000    
Revolving Credit Facility [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations 665,000 [6] 290,000          
Line of Credit Facility, Remaining Borrowing Capacity 4,300,000            
Line of Credit Facility, Maximum Borrowing Capacity $ 5,000,000 5,000,000 4,250,000 3,500,000 $ 2,500,000    
Line of Credit Facility, Increase (Decrease), Net   750,000 $ 750,000 $ 1,000,000      
Revolving Credit Facility [Member] | Minimum [Member]              
Debt Instrument [Line Items]              
Line of Credit Facility, Commitment Fee Percentage 0.08%            
Revolving Credit Facility [Member] | Maximum [Member]              
Debt Instrument [Line Items]              
Line of Credit Facility, Commitment Fee Percentage 0.30%            
Commercial Paper [Member]              
Debt Instrument [Line Items]              
Total debt and other obligations [7] $ 265,000 285,000          
Line of Credit Facility, Maximum Borrowing Capacity   $ 1,000,000          
Commercial Paper $ 265,000            
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage 0.875%            
London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage 1.75%            
[1] Represents the weighted-average stated interest rate.
[2] If the respective series of Tower Revenue Notes are not paid in full on or prior to an applicable anticipated repayment date, then Excess Cash Flow (as defined in the indenture governing the terms of such notes) of the issuers of such notes will be used to repay principal of the applicable series and class of the Tower Revenue Notes, and additional interest (of an additional approximately 5% per annum) will accrue on the respective Tower Revenue Notes. As of December 31, 2021, the Tower Revenue Notes have principal amounts of $250 million, $700 million and $750 million, with anticipated repayment dates in 2023, 2025 and 2028, respectively.
[3] The Tower Revenue Notes, Series 2015-2 ("May 2015 Tower Revenue Notes") and Tower Revenue Notes, Series 2018-1 and 2018-2 ("July 2018 Tower Revenue Notes") are collectively referred to herein as "Tower Revenue Notes."
[4] Both the 2016 Revolver and 2016 Term Loan A bear interest, at our option, at either (1) LIBOR plus a credit spread ranging from 0.875% to 1.750% per annum or (2) an alternate base rate plus a credit spread ranging from 0.000% to 0.750% per annum, in each case, with the applicable credit spread based on the Company's senior unsecured debt rating. The Company pays a commitment fee ranging from 0.080% to 0.300%, based on the Company's senior unsecured debt rating, per annum on the undrawn available amount under the 2016 Revolver. See further discussion below regarding (1) potential adjustments to such percentages and (2) LIBOR transition provisions.
[5] The Company's finance leases and other obligations relate to land, fiber, vehicles, and other assets and bear interest rates ranging up to 10% and mature in periods ranging from less than one year to approximately 25 years.
[6] As of December 31, 2021, the undrawn availability under the 2016 Revolver was $4.3 billion.
[7] The maturities of the Commercial Paper Notes, as defined below, when outstanding, may vary but may not exceed 397 days from the date of issuance.