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STOCKHOLDERS' EQUITY - Schedule of Changes in the Balance of AOCL, Net of Tax (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 24, 2017
Sep. 25, 2016
Sep. 24, 2017
Sep. 25, 2016
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax        
Beginning Balance     $ 1,606 $ 3,097
Other comprehensive income (loss) before reclassifications     126 (46)
Total reclassified from AOCL     616 499
Other comprehensive income, net of tax $ 277 $ 113 742 453
Ending Balance 2,175 2,430 2,175 2,430
Amounts reclassified from accumulated other comprehensive loss, net of tax 200 175 602 521
Net actuarial losses 258 234    
Amortization of net prior service credits (58) (59)    
Postretirement Benefit Plans        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax        
Beginning Balance     (11,981) (11,314)
Other comprehensive income (loss) before reclassifications     3  
Total reclassified from AOCL     602 387
Other comprehensive income, net of tax     605 387
Ending Balance (11,376) (10,927) (11,376) (10,927)
Other, net        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax        
Beginning Balance     (121) (130)
Other comprehensive income (loss) before reclassifications     123 (46)
Total reclassified from AOCL     14 112
Other comprehensive income, net of tax     137 66
Ending Balance 16 (64) 16 (64)
AOCL        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax        
Beginning Balance     (12,102) (11,444)
Other comprehensive income, net of tax     742 453
Ending Balance $ (11,360) $ (10,991) (11,360) (10,991)
Recognition of net actuarial losses        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax        
Total reclassified from AOCL     774 703
Amortization of net prior service credits        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax        
Total reclassified from AOCL     (172) (182)
Recognition of net prior service credits from divestiture of IS&GS        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax        
Total reclassified from AOCL       (134)
Other        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax        
Total reclassified from AOCL     $ 14 $ 112