v3.26.1
Changes in Accumulated Other Comprehensive Loss, Net of Tax (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Mar. 28, 2026
Mar. 29, 2025
Mar. 28, 2026
Mar. 29, 2025
Accumulated Other Comprehensive Income (Loss) [Line Items]        
AOCI, Beginning Balance $ (2,900) $ (2,688) $ (2,914) $ (3,699)
Unrealized gains (losses) arising during the period (114) (124) (146) 83
Reclassifications of realized net (gains) losses to net income 63 (65) 109 (107)
AOCI reclassifications to comprehensive income, net of tax       846
AOCI, Ending Balance (2,951) (2,877) (2,951) (2,877)
Market Value Adjustments for Hedges        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
AOCI, Beginning Balance (398) 114 (429) (248)
Unrealized gains (losses) arising during the period 111 (163) 93 266
Reclassifications of realized net (gains) losses to net income 66 (90) 115 (157)
AOCI reclassifications to comprehensive income, net of tax       0
AOCI, Ending Balance (221) (139) (221) (139)
Accumulated other comprehensive (income) loss related to defined benefit plans.        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
AOCI, Beginning Balance (1,458) (1,687) (1,455) (1,712)
Unrealized gains (losses) arising during the period 8 (7) 8 (7)
Reclassifications of realized net (gains) losses to net income (3) 25 (6) 50
AOCI reclassifications to comprehensive income, net of tax       0
AOCI, Ending Balance (1,453) (1,669) (1,453) (1,669)
Foreign Currency Translation and Other        
Accumulated Other Comprehensive Income (Loss) [Line Items]        
AOCI, Beginning Balance (1,044) (1,115) (1,030) (1,739)
Unrealized gains (losses) arising during the period (233) 46 (247) (176)
Reclassifications of realized net (gains) losses to net income 0 0 0 0
AOCI reclassifications to comprehensive income, net of tax       846
AOCI, Ending Balance $ (1,277) $ (1,069) $ (1,277) $ (1,069)