Equity (Details) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Mar. 31, 2024 installment $ / shares shares	Mar. 29, 2024 USD ($) $ / shares shares	Mar. 31, 2023 USD ($) $ / shares shares	Mar. 29, 2024 USD ($) $ / shares shares	Mar. 31, 2023 USD ($) $ / shares shares	Sep. 29, 2023 USD ($)
Swiss Law Capital Band, Maximum Percentage of Increase of Share Capital	120.00%
Swiss Law Capital Band, Maximum Percentage of Reduction of Share Capital	80.00%
Dividends paid per common share | $ / shares		$ 0.59	$ 0.56	$ 1.18	$ 1.12
Cancellation of treasury shares (in shares) | shares	6
Dividend or cash distribution approved (in currency per share) | $ / shares	$ 2.60
Number of quarterly dividend installments | installment	4
Cash distribution quarterly installment payable (in dollars per share) | $ / shares	$ 0.65
Unpaid portion of the dividend payment recorded in accrued and other current liabilities		$ 798		$ 798		$ 368
Share repurchase program, increase in authorized amount				$ 1,500
Number of common shares repurchased | shares				6	4
Repurchase value		406	$ 199	$ 826	$ 432
Amount available for repurchase, at end of period		$ 1,400		$ 1,400
Treasury Shares
Cancellation of treasury shares (in shares) | shares		6	9	6	9
Number of common shares repurchased | shares		3	2	6	4
Repurchase value		$ 406	$ 199	$ 826	$ 432