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v3.20.1

Contract Asset and Liability (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2020 | Dec. 31, 2019
Revenue from contract with customer [Line Items] |  |
Contract with Customer, Asset, Change | $ 304 |
Contract with Customer, Liability, Change | (26) |
Contract with Customer, Liability, Revenue Recognized | 2,200 |
Contract with Customer, Asset, Allowance for Credit Loss | 58 |
Contract assets, current | 4,549 | $ 4,184
Contract with Customer, Asset, Net, Noncurrent | 1,277 | 1,338
Contract with Customer, Asset | 5,826 | 5,522
Contract liabilities, current | 6,384 | 6,180
Contract with Customer, Liability, Noncurrent | 5,554 | 5,732
Contract with Customer, Liability | 11,938 | 11,912
Contract with Customer, Net | 6,112 | $ 6,390
COVID-19 [Member] |  |
Revenue from contract with customer [Line Items] |  |
Contract with Customer, Asset, Allowance for Credit Loss | 29 |
Otis [Member] |  |
Revenue from contract with customer [Line Items] |  |
Customer billings in excess of revenue recognized | $ 278 |

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- Definition Amount of accumulated credit loss for right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=118944033&loc=SL49130533-203044 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=118955202&loc=SL82895884-210446 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 13 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=119407570&loc=SL82919249-210447 + Details
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