|**CONTRACT ASSETS AND CONTRACT LIABILITIES (Tables)** | 12 Months Ended                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
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|**Revenue from Contract with Customer [Abstract]**    |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
|Schedule of Contract Assets and Contract Liabilities  | Contract assets and contract liabilities are summarized below:(In millions)December 31, 2021January 1, 2021Contract assets$3,021$2,437Contract liabilities, current(1,297)(1,198)Contract  liabilities, non-current(1)(107)(73)Net contract assets$1,617$1,166_______________(1)The non-current portion of contract liabilities is included as a component of the “Other long-term liabilities” line item in our Consolidated Balance Sheet.The components of contract assets are summarized below:(In millions)December 31, 2021January 1, 2021Unbilled contract receivables, gross$4,825$4,268Unliquidated progress payments and advances(1,804)(1,831)Contract assets$3,021$2,437
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|(In millions)                                         | December 31, 2021                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
|Contract assets                                       | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Contract liabilities, current                         | (1,297)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|Contract  liabilities, non-current(1)                 | (107)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
|Net contract assets                                   | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
|(In millions)                                         | December 31, 2021                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|                                                      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
|Unbilled contract receivables, gross                  | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   
|Unliquidated progress payments and advances           | (1,804)                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             
|Contract assets                                       | $                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   

X- DefinitionTabular 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.
+ ReferencesReference 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
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