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Stockholders' Equity - Changes in Balance of Accumulated Other Comprehensive Loss, Net of Income Taxes (Detail) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 12 Months Ended
Jun. 26, 2022
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance   $ 10,959 $ 6,038 $ 3,171
Other comprehensive income (loss) before reclassifications   1,714 3,319 (1,011)
Amounts reclassified from AOCL        
Amounts reclassified from AOCL   1,269 1,796 444
Other comprehensive income (loss), net of tax   2,983 5,115 (567)
Ending balance   9,266 10,959 6,038
Non-cash, non-operating pension settlement charge $ 1,500 1,500 1,700  
Non-cash, non-operating pension settlement charge, after tax $ 1,200 $ 1,200 $ 1,300  
Non-cash, non-operating pension settlement charge, per share, after tax (in dollars per share) $ 4.33 $ 4.33 $ 4.72  
Postretirement Benefit Plans        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance   $ (10,964) $ (16,155) (15,528)
Other comprehensive income (loss) before reclassifications   1,873 3,404 (1,067)
Amounts reclassified from AOCL        
Amounts reclassified from AOCL   1,225 1,787 440
Other comprehensive income (loss), net of tax   3,098 5,191 (627)
Ending balance   (7,866) (10,964) (16,155)
AOCI related to postretirement benefit plans, tax benefit   2,100 3,000 4,400
Other, net        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance   (42) 34 (26)
Other comprehensive income (loss) before reclassifications   (159) (85) 56
Amounts reclassified from AOCL        
Amounts reclassified from AOCL   44 9 4
Other comprehensive income (loss), net of tax   (115) (76) 60
Ending balance   (157) (42) 34
AOCL        
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]        
Beginning balance   (11,006) (16,121) (15,554)
Amounts reclassified from AOCL        
Other comprehensive income (loss), net of tax   2,983 5,115 (567)
Ending balance   (8,023) (11,006) (16,121)
Recognition of settlement loss        
Amounts reclassified from AOCL        
Amounts reclassified from AOCL   1,156 1,310  
Recognition of net actuarial losses        
Amounts reclassified from AOCL        
Amounts reclassified from AOCL   337 733 689
Amortization of net prior service credits        
Amounts reclassified from AOCL        
Amounts reclassified from AOCL   (268) (256) (249)
Other        
Amounts reclassified from AOCL        
Amounts reclassified from AOCL   $ 44 $ 9 $ 4