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Valuation of debt and equity investments and certain liabilities (Tables)
 9 Months Ended
Sep. 30, 2024
Fair Value Disclosures [Abstract]  
Schedule of Investments
Details of our investments are as follows:
 September 30, 2024December 31, 2023
Cash and Cash EquivalentsShort-Term InvestmentsLong-Term InvestmentsCash and Cash EquivalentsShort-Term InvestmentsLong-Term Investments
Measured at fair value:      
Money market funds$515 $— $— $1,068 $— $— 
Corporate obligations461 1,199 — 349 1,605 — 
U.S. government and agency securities747 4,667 — 696 3,808 — 
Non-U.S. government and agency securities150 297 — 50 198 — 
Mutual funds— — 11 — — 12 
Total1,873 6,163 11 2,163 5,611 12 
Other measurement basis:
Equity-method investments— — 11 — — 17 
Nonmarketable investments— — 4 — — 5 
Total— — 15 — — 22 
Cash on hand716 — — 801 — — 
Total$2,589 $6,163 $26 $2,964 $5,611 $34 
Schedule of Aggregate Maturities of Available-for-sale Debt Investments
The following table presents the aggregate maturities of our available-for-sale debt investments as of September 30, 2024:
Fair Value
One year or less$6,493 
One to two years1,028 
Schedule of Assets and Liabilities Accounted for at Fair Value
The following are our assets and liabilities that were accounted for at fair value on a recurring basis. These tables do not include cash on hand, assets held by our postretirement plans, or assets and liabilities that are measured at historical cost or any basis other than fair value.
 September 30, 2024December 31, 2023
 Level 1Level 2TotalLevel 1Level 2Total
Assets:      
Money market funds$515 $— $515 $1,068 $— $1,068 
Corporate obligations— 1,660 1,660 — 1,954 1,954 
U.S. government and agency securities3,021 2,393 5,414 3,618 886 4,504 
Non-U.S. government and agency securities— 447 447 — 248 248 
Mutual funds11 — 11 12 — 12 
Total assets$3,547 $4,500 $8,047 $4,698 $3,088 $7,786 
Liabilities:
Deferred compensation$435 $— $435 $393 $— $393 
Total liabilities$435 $— $435 $393 $— $393