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Asset Impairments and Unusual Items (Tables) | 12 Months Ended
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Dec. 31, 2017
Asset Impairments and Unusual Items |
Components of (Income) Expense from Divestitures, Asset Impairments and Unusual Items | The following table summarizes the major components of (income) expense from divestitures, asset impairments and unusual items, net for the years ended December 31 (in millions):
|  | 2017 |  | 2016 |  | 2015
(Income) expense from divestitures |  | $ | (38) |  | $ | 9 |  | $ | (7)
Asset impairments |  |  | 41 |  |  | 59 |  |  | 89
Other |  |  | (19) |  |  | 44 |  |  | —
|  | $ | (16) |  | $ | 112 |  | $ | 82

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