Shareholders' Equity (Details) $ / shares in Units, SFr in Millions, $ in Millions		1 Months Ended				9 Months Ended	12 Months Ended
	Mar. 11, 2022	Mar. 31, 2022 installment $ / shares	Mar. 31, 2021 installment $ / shares	Mar. 31, 2020 installment $ / shares	Mar. 31, 2019 installment $ / shares	Sep. 29, 2023	Sep. 30, 2022 USD ($) $ / shares shares	Sep. 24, 2021 USD ($) $ / shares shares	Sep. 25, 2020 USD ($) $ / shares shares	Sep. 30, 2022 CHF (SFr) shares	Sep. 24, 2021 CHF (SFr) shares
Maximum percentage of conditional shares that we may authorize for issuance							50.00%
Maximum percentage of shares that the board may authorize for issuance	50.00%
Maximum duration of the board's authorization to increase share capital	2 years
Swiss Law Capital Band, Maximum Duration of Authorization						5 years
Swiss Law Capital Band, Maximum Percentage of Increase of Share Capital						150.00%
Swiss Law Capital Band, Maximum Percentage of Reduction of Share Capital						50.00%
Dividends paid per common share | $ / shares							$ 2.12	$ 1.96	$ 1.88
Treasury shares | shares							12,749,540	9,060,919		12,749,540	9,060,919
Common shares held in treasury, owned by subsidiary | shares							5,000,000	4,000,000		5,000,000	4,000,000
Cancellation of treasury shares (in shares) | shares							5,000,000	3,000,000	12,000,000
Contributed surplus established for Swiss tax and statutory purposes ("Swiss Contributed Surplus")							$ 3,191	$ 3,905		SFr 4,239	SFr 4,902
Dividend or cash distribution approved (in currency per share) | $ / shares		$ 2.24	$ 2.00	$ 1.92	$ 1.84
Number of quarterly dividend installments | installment		4	4	4	4
Cash distribution quarterly installment payable (in dollars per share) | $ / shares		$ 0.56	$ 0.50	$ 0.48	$ 0.46
Unpaid portion of the dividend payment recorded in accrued and other current liabilities | $							356	327
Share repurchase program, increase in authorized amount | $							1,500	1,500
Repurchase value | $							1,409	$ 904	$ 505
Amount available for repurchase, at end of period | $							$ 1,700
Treasury Shares
Cancellation of treasury shares (in shares) | shares							5,000,000	3,000,000	12,000,000
Number of common shares repurchased | shares							10,000,000	7,000,000	6,000,000
Repurchase value | $							$ 1,409	$ 904	$ 505