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Segment and Geographic Information (Tables) | 9 Months Ended
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Sep. 30, 2018
Segment Reporting [Abstract] |
Schedule of Geographic Distributions of Revenues, Equity in Earnings of Affiliates, Adjusted Segment EBITDA and Depreciation and Amortization | The geographic distributions of our revenues, equity in earnings of affiliates, adjusted segment EBITDA and depreciation and amortization for the quarters and nine months ended September 30, 2018 and 2017 are summarized in the following table (dollars in millions):
|  | Quarter |  |  | Nine Months |
|  | 2018 |  |  | 2017 |  |  | 2018 |  |  | 2017 |
Revenues: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
National Group |  | $ | 5,542 |  |  | $ | 5,036 |  |  | $ | 16,719 |  |  | $ | 15,344 |
American Group |  |  | 5,396 |  |  |  | 5,180 |  |  |  | 16,113 |  |  |  | 15,268 |
Corporate and other |  |  | 513 |  |  |  | 480 |  |  |  | 1,571 |  |  |  | 1,440 |
|  | $ | 11,451 |  |  | $ | 10,696 |  |  | $ | 34,403 |  |  | $ | 32,052 |
Equity in earnings of affiliates: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
National Group |  | $ | (1 | ) |  | $ | (8 | ) |  | $ | (5 | ) |  | $ | (17 | )
American Group |  |  | (10 | ) |  |  | (9 | ) |  |  | (29 | ) |  |  | (27 | )
Corporate and other |  |  | 2 |  |  |  | 4 |  |  |  | 9 |  |  |  | 8 |
|  | $ | (9 | ) |  | $ | (13 | ) |  | $ | (25 | ) |  | $ | (36 | )
Adjusted segment EBITDA: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
National Group |  | $ | 1,127 |  |  | $ | 975 |  |  | $ | 3,593 |  |  | $ | 3,268 |
American Group |  |  | 1,072 |  |  |  | 930 |  |  |  | 3,250 |  |  |  | 2,977 |
Corporate and other |  |  | (103 | ) |  |  | (129 | ) |  |  | (402 | ) |  |  | (374 | )
|  | $ | 2,096 |  |  | $ | 1,776 |  |  | $ | 6,441 |  |  | $ | 5,871 |
Depreciation and amortization: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
National Group |  | $ | 245 |  |  | $ | 219 |  |  | $ | 702 |  |  | $ | 650 |
American Group |  |  | 258 |  |  |  | 251 |  |  |  | 765 |  |  |  | 727 |
Corporate and other |  |  | 79 |  |  |  | 69 |  |  |  | 230 |  |  |  | 204 |
|  | $ | 582 |  |  | $ | 539 |  |  | $ | 1,697 |  |  | $ | 1,581 |
Adjusted segment EBITDA |  | $ | 2,096 |  |  | $ | 1,776 |  |  | $ | 6,441 |  |  | $ | 5,871 |
Depreciation and amortization |  |  | 582 |  |  |  | 539 |  |  |  | 1,697 |  |  |  | 1,581 |
Interest expense |  |  | 442 |  |  |  | 427 |  |  |  | 1,309 |  |  |  | 1,257 |
Gains on sales of facilities |  |  | (6 | ) |  |  | (7 | ) |  |  | (420 | ) |  |  | (10 | )
Losses on retirement of debt |  |  | 9 |  |  |  | 39 |  |  |  | 9 |  |  |  | 39 |
Income before income taxes |  | $ | 1,069 |  |  | $ | 778 |  |  | $ | 3,846 |  |  | $ | 3,004 |

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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=115929826&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=115929826&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=108376223&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 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8721-108599 Reference 5: 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=115929826&loc=d3e8906-108599 + Details
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