Assets and Liabilities Measured at Fair Value (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Jun. 29, 2024	Sep. 30, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments	$ 95	$ 174
Other Liabilities	(552)	(465)
Total	(1,453)	(1,556)
Fair value of borrowings	44,064	41,456
Interest rate
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Liabilities	(1,479)	(1,791)
Foreign exchange
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	870	1,336
Derivative Liabilities	(394)	(815)
Other Derivative
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	7	18
Derivative Liabilities		(13)
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments	0	46
Other Liabilities	0	0
Total	0	46
Fair value of borrowings	0	0
Level 1 | Interest rate
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Liabilities	0	0
Level 1 | Foreign exchange
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	0	0
Derivative Liabilities	0	0
Level 1 | Other Derivative
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	0	0
Derivative Liabilities		0
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments	95	128
Other Liabilities	(552)	(465)
Total	(1,453)	(1,602)
Fair value of borrowings	42,691	40,123
Level 2 | Interest rate
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Liabilities	(1,479)	(1,791)
Level 2 | Foreign exchange
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	870	1,336
Derivative Liabilities	(394)	(815)
Level 2 | Other Derivative
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	7	18
Derivative Liabilities		(13)
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments	0	0
Other Liabilities	0	0
Total	0	0
Fair value of borrowings	1,373	1,333
Level 3 | Interest rate
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Liabilities	0	0
Level 3 | Foreign exchange
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	0	0
Derivative Liabilities	0	0
Level 3 | Other Derivative
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Asset	$ 0	0
Derivative Liabilities		$ 0