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Consolidated Statements of Comprehensive Income - USD ($)
$ in Millions
3 Months Ended
Mar. 25, 2018
Mar. 26, 2017
Statement of Comprehensive Income [Abstract]    
Net earnings $ 1,157 $ 789
Postretirement benefit plans    
Amounts reclassified from accumulated other comprehensive loss 300 202
Other comprehensive gain recognized during the period 0 3
Other, net 58 5
Other comprehensive income, net of tax 358 210
Comprehensive income $ 1,515 $ 999