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Other Income and Expense - Other Expense (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2018 | Mar. 31, 2017
Schedule of other expense [Line Items] |  |  |
Gain (Loss) on Disposition of Assets |  | $ (2) | $ (12)
Other Expenses |  | 9 | 24
Other Expense [Member] |  |  |
Schedule of other expense [Line Items] |  |  |
Gain (Loss) on Disposition of Assets |  | 2 | 21
Defined Benefit Plan, Other Cost (Credit) | [1] | 5 | 3
Other Nonoperating Expense |  | 2 | 0
Other Expenses |  | $ 9 | $ 24
[1] | (2) As of January 1, 2018, the Company retrospectively adopted ASU 2017-07, Compensation —Retirement Benefits. As such, $3 million of non-service costs associated with defined benefit plans for the three months ended March 31, 2017 were reclassified from Cost of Sales to Other Expense.

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- Definition Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=68055307&loc=d3e2443-110228 + Details
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