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Fair Value Measurements (Tables)
3 Months Ended
Mar. 31, 2025
Fair Value Disclosures [Abstract]  
Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis
The fair value hierarchy for assets and liabilities measured at fair value at March 31, 2025, and December 31, 2024, is as follows:
Assets and Liabilities Measured at Fair Value on a Recurring Basis
At March 31,
2025
At December 31,
2024
(Millions of dollars)
 TotalLevel 1Level 2Level 3TotalLevel 1Level 2Level 3
Derivatives - not designated$99 $77 $22 $ $137 $127 $10 $— 
Derivatives - designated    — — — — 
   Total Assets at Fair Value $99 $77 $22 $ $137 $127 $10 $— 
Derivatives - not designated219 106 113  136 47 89 — 
Derivatives - designated23 23   17 17 — — 
   Total Liabilities at Fair Value$242 $129 $113 $ $153 $64 $89 $—