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Other Expense
 3 Months Ended
Mar. 31, 2024
Other Income and Expenses [Abstract]  
Other Expense Other Expense
The components of other expense are as follows:
 
Three Months Ended March 31,
 20242023
(in millions)
ExxonMobil merger-related costs (a)
$9 $— 
Unoccupied facilities expense (b)
8 9 
Legal and environmental contingencies (Note 9)
2 16 
Impairment of long-lived assets (Note 4)
— 11 
Other5 5 
$24 $41 
____________________
(a)Primarily represents legal fees and other transaction costs associated with the ExxonMobil merger.
(b)Primarily represents facilities expense associated with certain offices acquired as part of business combinations that are no longer occupied by the Company.