v3.26.1
Equity Changes in Accumulated Other Comprehensive Loss, Before Tax (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Jun. 27, 2026
Jun. 28, 2025
Jun. 27, 2026
Jun. 28, 2025
Accumulated Other Comprehensive Income (Loss) [Line Items]        
AOCI before Tax, Attributable to Parent, Beginning Balance $ (3,569) $ (3,509) $ (3,535) $ (4,417)
Unrealized gains (losses) arising during the period (44) (198) (219) (55)
Reclassifications of realized net (gains) losses to net income 88 (41) 229 (180)
AOCI reclassifications to comprehensive income, before tax       904
AOCI before Tax, Attributable to Parent, Ending Balance (3,525) (3,748) (3,525) (3,748)
Market Value Adjustments for Hedges        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
AOCI before Tax, Attributable to Parent, Beginning Balance (276) (178) (549) (319)
Unrealized gains (losses) arising during the period (30) (433) 94 (87)
Reclassifications of realized net (gains) losses to net income 92 (74) 241 (279)
AOCI reclassifications to comprehensive income, before tax       0
AOCI before Tax, Attributable to Parent, Ending Balance (214) (685) (214) (685)
Unrecognized Pension and  Postretirement Medical  Expense        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
AOCI before Tax, Attributable to Parent, Beginning Balance (1,901) (2,184) (1,901) (2,243)
Unrealized gains (losses) arising during the period (3) 0 5 (7)
Reclassifications of realized net (gains) losses to net income (4) 33 (12) 99
AOCI reclassifications to comprehensive income, before tax       0
AOCI before Tax, Attributable to Parent, Ending Balance (1,908) (2,151) (1,908) (2,151)
Foreign Currency Translation and Other        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
AOCI before Tax, Attributable to Parent, Beginning Balance (1,392) (1,147) (1,085) (1,855)
Unrealized gains (losses) arising during the period (11) 235 (318) 39
Reclassifications of realized net (gains) losses to net income 0 0 0 0
AOCI reclassifications to comprehensive income, before tax       904
AOCI before Tax, Attributable to Parent, Ending Balance $ (1,403) $ (912) $ (1,403) $ (912)