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Contract Assets and Liabilities (Tables) | 6 Months Ended
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Jun. 30, 2021
Revenue from Contract with Customer [Abstract] |
Contract with Customer, Asset and Liability [Table Text Block] | Total contract assets and contract liabilities as of June 30, 2021 and December 31, 2020 are as follows:
(dollars in millions) | June 30, 2021 |  | December 31, 2020
Contract assets | $ | 10,485 |  |  | $ | 9,931 |
Contract liabilities | (12,591) |  |  | (12,889) |
Net contract liabilities | $ | (2,106) |  |  | $ | (2,958) |

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- Definition Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130551-203045 + Details
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- References No definition available. + Details
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