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Accounting Policies (Details)
$ / shares in Units, shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2024
USD ($)
$ / shares
shares
Dec. 31, 2023
USD ($)
$ / shares
shares
Dec. 31, 2022
USD ($)
$ / shares
shares
Capitalized Labor Costs $ 298 $ 299 $ 265
Asset write-down charges 148 33 34
Revenue, Remaining Performance Obligation, Amount 2,000 2,100 2,300
Contract with Customer, Liability, Revenue Recognized 490 631  
Interest expense on debt obligations 920 836 685
Amortization of deferred financing costs and adjustments on long-term debt, net 32 29 26
Capitalized interest (20) (15) (12)
Interest expense and amortization of deferred financing costs, net $ 932 850 699
Percentage of tax position that is likely of being realized upon ultimate settlement 50.00%    
Portion of company site rental costs that are Towers ground lease expenses 40.00%    
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 21.00%    
Other current assets $ 40 56  
Accelerated prepaid rent amort   59  
Site rental revenue - remaining rental obligation 5 170  
Net Income (Loss) Available to Common Stockholders, Basic $ (3,903) $ 1,502 $ 1,675
Basic (in shares) | shares 434 434 433
Diluted (in shares) | shares 434 434 434
Basic (in dollars per share) | $ / shares $ (8.98) $ 3.46 $ 3.87
Diluted (in dollars per share) | $ / shares (8.98) 3.46 3.86
Common Stock, Dividends, Per Share, Declared | $ / shares $ 6.26 $ 6.26 $ 5.98
Goodwill Impairment $ 4,958 $ 0 $ 0
Cancelled greenfield small cell nodes 7,000    
Fiber [Member]      
Goodwill Impairment $ 4,958    
Performance Obligations      
Other current assets $ 31 $ 44  
Minimum [Member]      
Revenue Recognition Non-cancelable Term - Fiber one    
Ground Lease Agreement Initial Term five    
Revenue Recognition Non-cancelable Lease Term five    
Service revenue payment terms 45    
Maximum [Member]      
Revenue Recognition Non-cancelable Term - Fiber 20    
Ground Lease Agreement Initial Term 15    
Revenue Recognition Non-cancelable Lease Term 15    
Service revenue payment terms 90    
Restricted Stock Units (RSUs) [Member]      
Effect of assumed dilution from potential common shares relating to stock options and restricted stock awards | shares 0 0 1
Property, Plant and Equipment [Member]      
Asset write-down charges $ 146 $ 40 $ 39
Property, Plant and Equipment [Member] | Cancelled greenfield small cell nodes write-off charges      
Asset write-down charges $ 106    
Communication Infrastructure [Member] | Minimum [Member]      
Property, Plant and Equipment, Useful Life 1 year    
Communication Infrastructure [Member] | Maximum [Member]      
Property, Plant and Equipment, Useful Life 20 years    
Finite-lived intangible assets and site rental contracts | Maximum [Member]      
Useful life of site rental contracts and customer relationships (years) 20 years