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Restructuring Other Related Charges (Details) $ in Millions | 6 Months Ended
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Jun. 30, 2018 Employee | Jun. 30, 2017 USD ($)
Other Related Charges [Abstract] |  |
Other Nonrecurring Expense |  | $ 7
Charges related to voluntary termination program, Expected Number of Positions Eliminated | Employee | 358 |
Share-based Compensation Arrangement by Share-based Payment Award Accelerated Compensation Cost |  | 2
Charges related to voluntary termination program |  | $ 14

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- Definition Amount of other expense that is infrequent in occurrence or unusual in nature. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=64828382&loc=d3e15138-107781 + Details
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- Definition Additional share-based compensation cost recognized as a result of an occurrence of an event that accelerates its recognition. + References No definition available. + Details
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