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Restructuring Costs (Tables)
 3 Months Ended
Mar. 31, 2024
Restructuring and Related Activities [Abstract]  
Restructuring Costs The following table summarizes the Company’s restructuring liabilities:
Three Months Ended 
March 31,
(In millions)20242023
Balance at beginning of period$47 $77 
Additions related to merger integration— 7
Reductions related to severance payments(11)(7)
Balance at end of period$36 $77