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Income Taxes Income Tax Examination (Details) $ in Millions | 3 Months Ended
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Mar. 31, 2019 USD ($)
Closure of IRS audit of Rockwell Subsidiary Tax Year 2014 [Member] |
Income Tax Examination [Line Items] |
Tax Settlement Gain (Loss) Noncash | $ 40
Reversal of Indemnity Asset [Member] |
Income Tax Examination [Line Items] |
Tax Settlement Gain (Loss) Noncash | $ (23)

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- Details
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