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Retrospective Application of Change in Accounting Policy (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Operating revenues |  |  |  |
Service |  | $ 4,050 | $ 4,356 | $ 4,338
Total operating revenues |  | 5,155 | 5,210 | 5,018
Operating income (loss) |  | 111 | 431 | (181)
Investment and other income (expense) |  |  |  |
Interest and dividend income |  | 11 | 5 | 8
Total investment and other income |  | (19) | 4 | 29
As previously reported |  |  |  |
Operating revenues |  |  |  |
Service | [1] | 3,999 | 4,322 | 4,329
Total operating revenues | [1] | 5,104 | 5,176 | 5,009
Operating income (loss) | [1] | 60 | 397 | (190)
Investment and other income (expense) |  |  |  |
Interest and dividend income | [1] | 62 | 39 | 17
Total investment and other income | [1] | 32 | 38 | 38
Adjustment |  |  |  |
Operating revenues |  |  |  |
Service |  | 51 | 34 | 9
Investment and other income (expense) |  |  |  |
Interest and dividend income |  | $ (51) | $ (34) | $ (9)
[1] | In Annual Report on Form 10-K for the year ended December 31, 2016, filed on February 24, 2017.

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