Debt and Other Financing Arrangements - Schedule of Subsequent Events (Details) - Senior notes - Subsequent Event SFr in Millions	3 Months Ended
	Mar. 31, 2025 CHF (SFr)
0.790% 3-Year Senior Notes, Due January 6, 2028 (Swiss franc-denominated)
Debt Instrument [Line Items]
Interest rate	0.79%
Term	3 years
Principal Value Issued	SFr 88
1.120% 5-Year Senior Notes, Due January 6, 2030 (Swiss franc-denominated)
Debt Instrument [Line Items]
Interest rate	1.12%
Term	5 years
Principal Value Issued	SFr 234
1.520% 12-Year Senior Notes, Due January 6, 2037 (Swiss franc-denominated)
Debt Instrument [Line Items]
Interest rate	1.52%
Term	12 years
Principal Value Issued	SFr 311
1.490% 20-Year Senior Notes, Due January 6, 2045 (Swiss franc-denominated)
Debt Instrument [Line Items]
Interest rate	1.49%
Term	20 years
Principal Value Issued	SFr 185
1.470% 25-Year Senior Notes, Due January 6, 2050 (Swiss franc-denominated)
Debt Instrument [Line Items]
Interest rate	1.47%
Term	25 years
Principal Value Issued	SFr 327