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Segment Information (Tables) | 3 Months Ended
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Mar. 31, 2021
Segment Reporting [Abstract] |
Schedule of Segment Results | The following tables summarize our segment results for the three months ended March 31, 2021 and 2020, based on the segment categorization we were operating under at March 31, 2021.
| Three Months Ended March 31, 2021
| Business | Mass Markets | Total Segments | Operations and Other | Total
| (Dollars in millions)
Revenue | $ | 3,595 |  | 1,434 |  | 5,029 |  | — |  | 5,029 |
Expenses: |  |  |  |  |
Cost of services and products | 881 |  | 43 |  | 924 |  | 1,212 |  | 2,136 |
Selling, general and administrative | 306 |  | 133 |  | 439 |  | 317 |  | 756 |
Less: share-based compensation | — |  | — |  | — |  | (20) |  | (20) |
Total expense | 1,187 |  | 176 |  | 1,363 |  | 1,509 |  | 2,872 |
Total adjusted EBITDA | $ | 2,408 |  | 1,258 |  | 3,666 |  | (1,509) |  | 2,157 |
| Three Months Ended March 31, 2020
| Business | Mass Markets | Total Segments | Operations and Other | Total
| (Dollars in millions)
Revenue | $ | 3,737 |  | 1,491 |  | 5,228 |  | — |  | 5,228 |
Expenses: |  |  |  |  |
Cost of services and products | 907 |  | 49 |  | 956 |  | 1,279 |  | 2,235 |
Selling, general and administrative | 342 |  | 140 |  | 482 |  | 371 |  | 853 |
Less: share-based compensation | — |  | — |  | — |  | (69) |  | (69) |
Total expense | 1,249 |  | 189 |  | 1,438 |  | 1,581 |  | 3,019 |
Total adjusted EBITDA | $ | 2,488 |  | 1,302 |  | 3,790 |  | (1,581) |  | 2,209 |
Reconciliation of Operating Profit (Loss) From Segments to Consolidated Net Income | The following table reconciles total segment adjusted EBITDA to net income (loss):
| Three Months Ended March 31,
| 2021 |  | 2020
| (Dollars in millions)
Total segment adjusted EBITDA | $ | 3,666 |  |  | 3,790 |
Depreciation and amortization | (1,150) |  |  | (1,160) |
Other operating expenses | (1,509) |  |  | (1,581) |
Stock-based compensation | (20) |  |  | (69) |
Operating income | 987 |  |  | 980 |
Total other expense, net | (355) |  |  | (547) |
Income before income taxes | 632 |  |  | 433 |
Income tax expense | 157 |  |  | 119 |
Net income | $ | 475 |  |  | 314 |

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- Definition Tabular disclosure of the reconciliation of profit (loss) from reportable segments to the consolidated income (loss) before income tax expense (benefit) and discontinued operations. Includes, but is not limited to, reconciliation after income tax if income tax is allocated to the reportable segment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8924-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 + Details
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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 -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8813-108599 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 + Details
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