Financial Instruments, Derivatives and Fair Value Measures - Bases of Measurement (Details) - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Quoted Prices in Active Markets
Assets, at Fair Value
Equity securities	$ 327	$ 326
Foreign currency forward exchange contracts	0	0
Total Assets	327	326
Liabilities, at Fair Value
Fair value of hedged long-term debt	0	0
Interest rate swap derivative financial instruments	0	0
Foreign currency forward exchange contracts	0	0
Contingent consideration related to business combinations	0	0
Total Liabilities	0	0
Significant Other Observable Inputs
Assets, at Fair Value
Equity securities	0	0
Foreign currency forward exchange contracts	170	169
Total Assets	170	169
Liabilities, at Fair Value
Fair value of hedged long-term debt	2,046	2,052
Interest rate swap derivative financial instruments	119	95
Foreign currency forward exchange contracts	100	231
Contingent consideration related to business combinations	0	0
Total Liabilities	2,265	2,378
Significant Unobservable Inputs
Assets, at Fair Value
Equity securities	0	0
Foreign currency forward exchange contracts	0	0
Total Assets	0	0
Liabilities, at Fair Value
Fair value of hedged long-term debt	0	0
Interest rate swap derivative financial instruments	0	0
Foreign currency forward exchange contracts	0	0
Contingent consideration related to business combinations	59	112
Total Liabilities	59	112
Outstanding Balances
Assets, at Fair Value
Equity securities	327	326
Foreign currency forward exchange contracts	170	169
Total Assets	497	495
Liabilities, at Fair Value
Fair value of hedged long-term debt	2,046	2,052
Interest rate swap derivative financial instruments	119	95
Foreign currency forward exchange contracts	100	231
Contingent consideration related to business combinations	59	112
Total Liabilities	$ 2,324	$ 2,490