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Acquisition, Dispositions, Goodwill and Other Intangible Assets (Goodwill) (Details) $ in Millions | 6 Months Ended
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Jun. 30, 2019 USD ($)
Goodwill [Line Items] |
Goodwill - Beginning Balance | $ 48,112
Goodwill Resulting from Business Combinations | 263
Goodwill - Foreign Currency Translation and Other | (17)
Goodwill - Ending Balance | 48,358
Otis [Member] |
Goodwill [Line Items] |
Goodwill - Beginning Balance | 1,688
Goodwill Resulting from Business Combinations | 7
Goodwill - Foreign Currency Translation and Other | (16)
Goodwill - Ending Balance | 1,679
Carrier [Member] |
Goodwill [Line Items] |
Goodwill - Beginning Balance | 9,835
Goodwill Resulting from Business Combinations | 1
Goodwill - Foreign Currency Translation and Other | 3
Goodwill - Ending Balance | 9,839
Pratt & Whitney [Member] |
Goodwill [Line Items] |
Goodwill - Beginning Balance | 1,567
Goodwill Resulting from Business Combinations | 0
Goodwill - Foreign Currency Translation and Other | (4)
Goodwill - Ending Balance | 1,563
Collins Aerospace Systems [Member] |
Goodwill [Line Items] |
Goodwill - Beginning Balance | 35,001
Goodwill Resulting from Business Combinations | 255
Goodwill - Foreign Currency Translation and Other | 0
Goodwill - Ending Balance | 35,256
Total Segments [Member] |
Goodwill [Line Items] |
Goodwill - Beginning Balance | 48,091
Goodwill Resulting from Business Combinations | 263
Goodwill - Foreign Currency Translation and Other | (17)
Goodwill - Ending Balance | 48,337
Eliminations and other [Member] |
Goodwill [Line Items] |
Goodwill - Beginning Balance | 21
Goodwill Resulting from Business Combinations | 0
Goodwill - Foreign Currency Translation and Other | 0
Goodwill - Ending Balance | 21
Customer relationships and other [Member] |
Goodwill [Line Items] |
Goodwill, Purchase Accounting Adjustments | $ 100

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