Financial Instruments and Fair Value Measurements, Assets Measured at Fair Value on Non-Recurring Basis (Details) - USD ($) $ in Millions	9 Months Ended	12 Months Ended
	Jun. 29, 2024	Sep. 30, 2023
Impairment [Abstract]
Indefinite-lived trademarks	$ 0	$ 0
Goodwill	0	0
Definite lived intangible assets	0	0
Property, plant, and equipment	8	8
Impairment charges	8	8
Fair Value Adjustment [Abstract]
Fair value of long-term indebtedness greater/(less) than book value	(215)
Fair Value on Non-Recurring Basis [Member]
Fair Value of Assets [Abstract]
Indefinite-lived trademarks	248	248
Goodwill	5,019	4,981
Definite lived intangible assets	1,291	1,455
Property, plant, and equipment	4,558	4,576
Total	11,116	11,260
Fair Value on Non-Recurring Basis [Member] | Level 1 [Member]
Fair Value of Assets [Abstract]
Indefinite-lived trademarks	0	0
Goodwill	0	0
Definite lived intangible assets	0	0
Property, plant, and equipment	0	0
Total	0	0
Fair Value on Non-Recurring Basis [Member] | Level 2 [Member]
Fair Value of Assets [Abstract]
Indefinite-lived trademarks	0	0
Goodwill	0	0
Definite lived intangible assets	0	0
Property, plant, and equipment	0	0
Total	0	0
Fair Value on Non-Recurring Basis [Member] | Level 3 [Member]
Fair Value of Assets [Abstract]
Indefinite-lived trademarks	248	248
Goodwill	5,019	4,981
Definite lived intangible assets	1,291	1,455
Property, plant, and equipment	4,558	4,576
Total	$ 11,116	$ 11,260