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Revenue Recognition, Consolidated Statement Of Operations (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Operating revenues |  |
Service | $ 724 | $ 746
Equipment sales | 218 | 190
Total operating revenues | 942 | 936
Cost of equipment sold | 219 | 228
(Gain) loss on license sales and exchanges, net | (7) | (17)
Total operating expenses | 877 | 882
Operating income (loss) | 65 | 54
Income (loss) before income taxes | 77 | 61
Income tax expense (benefit) | 22 | 33
Net income (loss) | 55 | 28
Net income (loss) attributable to U.S. Cellular shareholders | $ 45 | $ 26
Basic earnings (loss) per share attributable to U.S. Cellular shareholders | $ 0.52 | $ 0.31
Diluted earnings (loss) per share attributable to U.S. Cellular shareholders | $ 0.52 | $ 0.31
Results under prior accounting standards |  |
Operating revenues |  |
Service | $ 754 |
Equipment sales | 198 |
Total operating revenues | 952 |
Cost of equipment sold | 222 |
(Gain) loss on license sales and exchanges, net | (6) |
Total operating expenses | 882 |
Operating income (loss) | 70 |
Income (loss) before income taxes | 82 |
Income tax expense (benefit) | 24 |
Net income (loss) | 58 |
Net income (loss) attributable to U.S. Cellular shareholders | $ 48 |
Basic earnings (loss) per share attributable to U.S. Cellular shareholders | $ 0.56 |
Diluted earnings (loss) per share attributable to U.S. Cellular shareholders | $ 0.56 |
Adjustment |  |
Operating revenues |  |
Service | $ (30) |
Equipment sales | 20 |
Total operating revenues | (10) |
Cost of equipment sold | (3) |
(Gain) loss on license sales and exchanges, net | (1) |
Total operating expenses | (5) |
Operating income (loss) | (5) |
Income (loss) before income taxes | (5) |
Income tax expense (benefit) | (2) |
Net income (loss) | (3) |
Net income (loss) attributable to U.S. Cellular shareholders | $ (3) |
Basic earnings (loss) per share attributable to U.S. Cellular shareholders | $ (0.04) |
Diluted earnings (loss) per share attributable to U.S. Cellular shareholders | $ (0.04) |

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