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Acquisitions/Dispositions (Acquired Finite-Lived Intangibles Assets) (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2018 USD ($)
Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets acquired | $ 405 |
Customer Lists |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets acquired | $ 378 |
Finite-lived intangible assets, remaining amortization period | 13 years |
Other Intangible Assets |  |
Finite-Lived Intangible Assets [Line Items] |  |
Finite-lived intangible assets acquired | $ 27 | [1]
Finite-lived intangible assets, remaining amortization period | 5 years | [1]
[1] | Primarily non-compete agreements, trade names and developed technology

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- Definition Remaining amortization period of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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