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Investments (Tables)
 12 Months Ended
Dec. 31, 2024
Investments, Debt and Equity Securities [Abstract]  
Schedule of Available-For-Sale Investments
The amortized cost, gross unrealized gains, gross unrealized losses and fair values of interest-bearing securities, which are classified as available for sale, by type of security were as follows (in millions):
Types of securities as of December 31, 2024Amortized
cost		Gross
unrealized
gains		Gross
unrealized
losses		Fair
values
U.S. Treasury bills$997 $— $— $997 
Money market mutual funds10,354 — — 10,354 
Other short-term interest-bearing securities135 — — 135 
Total available-for-sale investments$11,486 $— $— $11,486 
Types of securities as of December 31, 2023Amortized
cost		Gross
unrealized
gains		Gross
unrealized
losses		Fair
values
U.S. Treasury bills$— $— $— $— 
Money market mutual funds10,266 — — 10,266 
Other short-term interest-bearing securities138 — — 138 
Total available-for-sale investments$10,404 $— $— $10,404 
Schedule of Fair Values by Classification
The fair values of available-for-sale investments by location in the Consolidated Balance Sheets were as follows (in millions):
December 31,
Consolidated Balance Sheets locations20242023
Cash and cash equivalents$11,486 $10,404 
Total available-for-sale investments$11,486 $10,404