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OTHER - Investments (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended 15 Months Ended
Jun. 28, 2020
Jun. 28, 2020
Jun. 30, 2019
Sep. 30, 2021
Jun. 27, 2020
Investment Holdings [Line Items]          
Equity method investment impairment $ 128 $ 128 $ 0    
AMMROC          
Investment Holdings [Line Items]          
Ownership percent 40.00% 40.00%      
Equity method investments $ 307 $ 307     $ 435
Equity method investment impairment   128      
Equity method investment other than temporary impairment net of tax   $ 96      
Equity method investment other than temporary impairment earnings per share (in dollars per share)   $ 0.34      
AMMROC | Subsequent Event | Forecast          
Investment Holdings [Line Items]          
Proceeds from sale of investment       $ 307