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Valuation of debt and equity investments and certain liabilities (Tables)
 9 Months Ended
Sep. 30, 2023
Fair Value Disclosures [Abstract]  
Investments Details of our investments are as follows:
 September 30, 2023December 31, 2022
Cash and Cash EquivalentsShort-Term InvestmentsLong-Term InvestmentsCash and Cash EquivalentsShort-Term InvestmentsLong-Term Investments
Measured at fair value:      
Money market funds$1,141 $— $— $1,238 $— $— 
Corporate obligations280 1,519 — 276 1,535 — 
U.S. government and agency securities398 4,467 — 680 4,234 — 
Non-U.S. government and agency securities100 396 — 149 248 — 
Mutual funds— — 11 — — 11 
Total1,919 6,382 11 2,343 6,017 11 
Other measurement basis:
Equity-method investments— — 16 — — 18 
Non-marketable investments— — 5 — — 5 
Cash on hand647 — — 707 — — 
Total$2,566 $6,382 $32 $3,050 $6,017 $34 
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, 2023December 31, 2022
 Level 1Level 2TotalLevel 1Level 2Total
Assets:      
Money market funds$1,141 $— $1,141 $1,238 $— $1,238 
Corporate obligations— 1,799 1,799 — 1,811 1,811 
U.S. government and agency securities4,161 704 4,865 4,914 — 4,914 
Non-U.S. government and agency securities— 496 496 — 397 397 
Mutual funds11 — 11 11 — 11 
Total assets$5,313 $2,999 $8,312 $6,163 $2,208 $8,371 
Liabilities:
Deferred compensation$352 $— $352 $326 $— $326 
Total liabilities$352 $— $352 $326 $— $326 
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, 2023:
Fair Value
One year or less$6,775 
One to two years385