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Debt (Tables)
3 Months Ended
Mar. 31, 2023
Debt Disclosure [Abstract]  
Schedule of debt
Debt consisted of the following (in millions):

March 31,
2023
December 31,
2022
SHORT-TERM DEBT  
Senior notes:
2.85% senior notes due January 2023 (1)
$— $400 
3.85% senior notes due October 2023
700 700 
Other59 
Total short-term debt708 1,159 
LONG-TERM DEBT
Senior notes, net of unamortized discounts and debt issuance costs of $45 and $46, respectively
7,238 7,237 
Other50 50 
Total long-term debt7,288 7,287 
Total debt (2)
$7,996 $8,446 
(1)These senior notes were redeemed on January 31, 2023.
(2)Our fixed-rate senior notes had a face value of approximately $8.0 billion and $8.4 billion as of March 31, 2023 and December 31, 2022, respectively. We estimated the aggregate fair value of these notes as of March 31, 2023 and December 31, 2022 to be approximately $7.3 billion and $7.6 billion, respectively. Our fixed-rate senior notes are traded among institutions, and these trades are routinely published by a reporting service. Our determination of fair value is based on reported trading activity near the end of the reporting period. The fair value estimate for our senior notes is based upon observable market data and is classified in Level 2 of the fair value hierarchy.