Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 29, 2024	Mar. 31, 2023	Mar. 29, 2024	Mar. 31, 2023
Income Taxes
Income tax expense (benefit)	$ 146	$ 100	$ (959)	$ 187
Income tax benefit associated with a ten-year tax credit obtained by a Swiss subsidiary			$ 874
Duration of income tax benefit associated with a tax credit obtained by a Swiss subsidiary			10 years
Income tax benefit relating to revaluation of deferred tax assets resulting from corporate tax rate increase			$ 262
Income tax benefit associated with the tax impacts of a legal entity restructuring			118
Non-income tax expense related to a legal entity restructuring			4
Unrecognized income tax benefits, approximate amount that could be resolved in next twelve months	$ 30		$ 30