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INVESTMENTS (Tables)
 12 Months Ended
Dec. 31, 2025
Investments, Debt and Equity Securities [Abstract]  
Carrying value of equity securities by balance sheet location
The carrying values of our equity securities were included in the following line items in our consolidated balance sheets (in millions):
Fair Value with Changes Recognized in IncomeMeasurement Alternative —
No Readily Determinable
Fair Value
December 31, 2025
Marketable securities$489 $— 
Other noncurrent assets2,100 44 
Total equity securities$2,589 $44 
December 31, 2024
Marketable securities$418 $— 
Other noncurrent assets1,616 40 
Total equity securities$2,034 $40 
Unrealized Gain (Loss) on Investments [Table Text Block]
The calculation of net unrealized gains and losses recognized during the year related to equity securities still held at the end of the year is as follows (in millions):
Year Ended December 31, 20252024
Net gains (losses) recognized during the year related to equity securities $431 $323 
Less: Net gains (losses) recognized during the year related to equity securities sold during
   the year
54 106 
Net unrealized gains (losses) recognized during the year related to equity securities still held at
   the end of the year		$377 $217 
Schedule of available-for-sale and trading securities
Our debt securities consisted of the following (in millions):
Gross UnrealizedEstimated
Fair Value
CostGainsLosses
December 31, 2025
Trading securities
$49 $1 $— $50 
Available-for-sale securities
1,816 23 (65)1,774 
Total debt securities
$1,865 $24 $(65)$1,824 
December 31, 2024
Trading securities
$45 $1 $(1)$45 
Available-for-sale securities
1,728 21 (118)1,631 
Total debt securities
$1,773 $22 $(119)$1,676 
Carrying values of debt securities by balance sheet location
The carrying values of our debt securities were included in the following line items in our consolidated balance sheets (in millions):
December 31, 2025December 31, 2024
Trading SecuritiesAvailable-for-Sale SecuritiesTrading SecuritiesAvailable-for-Sale Securities
Marketable securities$50 $1,395 $45 $1,260 
Other noncurrent assets— 379 — 371 
Total debt securities$50 $1,774 $45 $1,631 
Contractual maturities of available-for-sale debt securities
The contractual maturities of these available-for-sale debt securities as of December 31, 2025 were as follows (in millions):
CostEstimated
Fair Value
Within 1 year$417 $415 
After 1 year through 5 years1,182 1,147 
After 5 years through 10 years38 46 
After 10 years179 166 
Total$1,816 $1,774 
Schedule of Realized Gain (Loss) [Table Text Block]
The sale and/or maturity of available-for-sale debt securities resulted in the following realized activity (in millions):
Year Ended December 31,202520242023
Gross gains$4 $14 $3 
Gross losses(6)(12)(10)
Proceeds657 709 361