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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 |  | $ 3,081 | $ 3,384 | $ 3,407
Total operating revenues |  | 3,990 | 4,031 | 3,902
Operating income (loss) |  | 48 | 347 | (134)
Investment and other income (expense) |  |  |  |
Interest and dividend income |  | 6 | 2 | 3
Total investment and other income |  | 34 | 57 | 75
As previously reported |  |  |  |
Operating revenues |  |  |  |
Service | [1] | 3,030 | 3,350 | 3,398
Total operating revenues | [1] | 3,939 | 3,997 | 3,893
Operating income (loss) | [1] | (3) | 313 | (143)
Investment and other income (expense) |  |  |  |
Interest and dividend income | [1] | 57 | 36 | 12
Total investment and other income | [1] | 85 | 91 | 84
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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