Debt and Financing Arrangements (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Fair value of long-term debt, excluding current portion	$ 6,300	$ 7,100
Long-term debt	$ 6,609	$ 7,580
Weighted average interest rate on short term borrowings (as a percent)	4.60%	4.70%
Line of Credit
Debt Instrument [Line Items]
Lines of credit	$ 12,200	$ 13,000
Unused lines of credit	9,800	9,100
Commercial Paper
Debt Instrument [Line Items]
Lines of credit	5,100	5,100
Amount utilized from lines of credit facility	$ 190	$ 1,700