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Accounting Policies (Details) $ / shares in Units, shares in Millions, $ in Millions | 12 Months Ended
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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 |  |

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