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Operating Segments Operating Segments (Tables) | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2024 | Sep. 30, 2024
Segment Reporting [Abstract] |  |
Schedule of Segment Reporting Information, by Segment |
| Three Months Ended September 30, 2024 |  | Three Months Ended September 30, 2023
| Towers |  | Fiber |  | Other |  | Total |  | Towers |  | Fiber |  | Other |  | Total
Segment site rental revenues | $ | 1,063 |  |  | $ | 530 |  |  |  |  | $ | 1,593 |  |  | $ | 1,074 |  |  | $ | 503 |  |  |  |  | $ | 1,577 |
Segment services and other revenues | 54 |  |  | 5 |  |  |  |  | 59 |  |  | 86 |  |  | 4 |  |  |  |  | 90 |
Segment revenues | 1,117 |  |  | 535 |  |  |  |  | 1,652 |  |  | 1,160 |  |  | 507 |  |  |  |  | 1,667 |
Segment site rental costs of operations | 240 |  |  | 182 |  |  |  |  | 422 |  |  | 236 |  |  | 175 |  |  |  |  | 411 |
Segment services and other costs of operations | 25 |  |  | 3 |  |  |  |  | 28 |  |  | 61 |  |  | 3 |  |  |  |  | 64 |
Segment costs of operations(a)(b) | 265 |  |  | 185 |  |  |  |  | 450 |  |  | 297 |  |  | 178 |  |  |  |  | 475 |
Segment site rental gross margin | 823 |  |  | 348 |  |  |  |  | 1,171 |  |  | 838 |  |  | 328 |  |  |  |  | 1,166 |
Segment services and other gross margin | 29 |  |  | 2 |  |  |  |  | 31 |  |  | 25 |  |  | 1 |  |  |  |  | 26 |
Segment selling, general and administrative expenses(b) | 19 |  |  | 40 |  |  |  |  | 59 |  |  | 24 |  |  | 48 |  |  |  |  | 72 |
Segment operating profit (loss) | 833 |  |  | 310 |  |  |  |  | 1,143 |  |  | 839 |  |  | 281 |  |  |  |  | 1,120 |
Other selling, general and administrative expenses(b) |  |  |  |  | $ | 70 |  |  | 70 |  |  |  |  |  |  | $ | 75 |  |  | 75 |
Stock-based compensation expense, net |  |  |  |  | 30 |  |  | 30 |  |  |  |  |  |  | 36 |  |  | 36 |
Depreciation, amortization and accretion |  |  |  |  | 432 |  |  | 432 |  |  |  |  |  |  | 439 |  |  | 439 |
Restructuring charges |  |  |  |  | 48 |  |  | 48 |  |  |  |  |  |  | 72 |  |  | 72 |
Interest expense and amortization of deferred financing costs, net |  |  |  |  | 236 |  |  | 236 |  |  |  |  |  |  | 217 |  |  | 217 |
Other (income) expenses to reconcile to income (loss) before income taxes(c) |  |  |  |  | 19 |  |  | 19 |  |  |  |  |  |  | 9 |  |  | 9 |
Income (loss) before income taxes |  |  |  |  |  |  | $ | 308 |  |  |  |  |  |  |  |  | $ | 272 |
Capital expenditures | $ | 32 |  |  | $ | 257 |  |  | $ | 8 |  |  | $ | 297 |  |  | $ | 49 |  |  | $ | 287 |  |  | $ | 11 |  |  | $ | 347 |
Total assets (at period end) | $ | 21,018 |  |  | $ | 16,342 |  |  | $ | 683 |  |  | $ | 38,043 |  |  | $ | 21,783 |  |  | $ | 16,237 |  |  | $ | 679 |  |  | $ | 38,699 |
(a)Exclusive of depreciation, amortization and accretion shown separately. (b)Segment costs of operations excludes (1) stock-based compensation expense, net of $6 million and $7 million for the three months ended September 30, 2024 and 2023, respectively and (2) prepaid lease purchase price adjustments of $4 million for each of the three months ended September 30, 2024 and 2023. Segment selling, general and administrative expenses and other selling, general and administrative expenses exclude stock-based compensation expense, net of $24 million and $29 million for the three months ended September 30, 2024 and 2023, respectively. (c)See condensed consolidated statement of operations and comprehensive income (loss) for further information. |
| Nine Months Ended September 30, 2024 |  | Nine Months Ended September 30, 2023
| Towers |  | Fiber |  | Other |  | Total |  | Towers |  | Fiber |  | Other |  | Total
Segment site rental revenues | $ | 3,196 |  |  | $ | 1,565 |  |  |  |  | $ | 4,761 |  |  | $ | 3,234 |  |  | $ | 1,695 |  |  |  |  | $ | 4,929 |
Segment services and other revenues | 143 |  |  | 15 |  |  |  |  | 158 |  |  | 356 |  |  | 22 |  |  |  |  | 378 |
Segment revenues | 3,339 |  |  | 1,580 |  |  |  |  | 4,919 |  |  | 3,590 |  |  | 1,717 |  |  |  |  | 5,307 |
Segment site rental costs of operations | 723 |  |  | 542 |  |  |  |  | 1,265 |  |  | 714 |  |  | 518 |  |  |  |  | 1,232 |
Segment services and other costs of operations | 76 |  |  | 10 |  |  |  |  | 86 |  |  | 252 |  |  | 8 |  |  |  |  | 260 |
Segment costs of operations(a)(b) | 799 |  |  | 552 |  |  |  |  | 1,351 |  |  | 966 |  |  | 526 |  |  |  |  | 1,492 |
Segment site rental gross margin | 2,473 |  |  | 1,023 |  |  |  |  | 3,496 |  |  | 2,520 |  |  | 1,177 |  |  |  |  | 3,697 |
Segment services and other gross margin | 67 |  |  | 5 |  |  |  |  | 72 |  |  | 104 |  |  | 14 |  |  |  |  | 118 |
Segment selling, general and administrative expenses(b) | 56 |  |  | 137 |  |  |  |  | 193 |  |  | 84 |  |  | 148 |  |  |  |  | 232 |
Segment operating profit (loss) | 2,484 |  |  | 891 |  |  |  |  | 3,375 |  |  | 2,540 |  |  | 1,043 |  |  |  |  | 3,583 |
Other selling, general and administrative expenses(b) |  |  |  |  | $ | 259 |  |  | 259 |  |  |  |  |  |  | $ | 246 |  |  | 246 |
Stock-based compensation expense |  |  |  |  | 108 |  |  | 108 |  |  |  |  |  |  | 126 |  |  | 126 |
Depreciation, amortization and accretion |  |  |  |  | 1,301 |  |  | 1,301 |  |  |  |  |  |  | 1,315 |  |  | 1,315 |
Restructuring charges |  |  |  |  | 104 |  |  | 104 |  |  |  |  |  |  | 72 |  |  | 72 |
Interest expense and amortization of deferred financing costs, net |  |  |  |  | 692 |  |  | 692 |  |  |  |  |  |  | 627 |  |  | 627 |
Other (income) expenses to reconcile to income (loss) before income taxes(c) |  |  |  |  | 27 |  |  | 27 |  |  |  |  |  |  | 37 |  |  | 37 |
Income (loss) before income taxes |  |  |  |  |  |  | $ | 884 |  |  |  |  |  |  |  |  | $ | 1,160 |
Capital expenditures | $ | 96 |  |  | $ | 819 |  |  | $ | 31 |  |  | $ | 946 |  |  | $ | 160 |  |  | $ | 872 |  |  | $ | 35 |  |  | $ | 1,067 |
(a)Exclusive of depreciation, amortization and accretion shown separately. (b)Segment costs of operations excludes (1) stock-based compensation expense, net of $20 million and $23 million for the nine months ended September 30, 2024 and 2023, respectively, and (2) prepaid lease purchase price adjustments of $12 million for each of the nine months ended September 30, 2024 and 2023. Segment selling, general and administrative expenses and other selling, general and administrative expenses exclude stock-based compensation expense, net of $88 million and $103 million for the nine months ended September 30, 2024 and 2023, respectively. (c)See condensed consolidated statement of operations and comprehensive income (loss) for further information.

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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-25 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-22 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-30 + Details
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