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Fair Value Measurements (Tables)
12 Months Ended
Dec. 31, 2023
Fair Value Disclosures [Abstract]  
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis
Assets and liabilities measured and recorded at fair value on a recurring basis consisted of the following (in millions):
 December 31, 2023December 31, 2022
TotalLevel 1Level 2Level 3TotalLevel 1Level 2Level 3
Assets
Mutual funds$1,025 $1,025 $ $ $897 $897 $— $— 
U.S. Government securities119  119  118 — 118 — 
Other securities679 333 301 45 660 333 264 63 
Derivatives32  32  18 — 18 — 
Liabilities
Derivatives200  200  196 — 196 —