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Business Segment Information (Narrative) (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2019 USD ($) segment contract | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Segment Reporting Information [Line Items] |  |  |
Core business segments, number | segment | 3 |  |
Non-core business segments, number | segment | 2 |  |
Number of contracts (more than) | contract | 1,000 |  |
Additional revenue and gross profit recognized | $ |  |  | $ 35
MMM Joint Venture |  |  |
Segment Reporting Information [Line Items] |  |  |
Equity in earnings (losses) of unconsolidated affiliates | $ | $ (13) | $ (3) |

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- Definition Business Segment, Number of Core Business Segment + References No definition available. + Details
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- Definition Business Segment, Number of Non-core Business Segment + References No definition available. + Details
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- Definition Equity Method Investment, Equity in Earnings (Loss) of Unconsolidated Affiliates + References No definition available. + Details
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- Definition Number of Contracts + References No definition available. + Details
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- Definition Amount of gain (loss) recognized in settlement of litigation and insurance claims. Excludes claims within an insurance entity's normal claims settlement process. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118942415&loc=d3e14326-108349 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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