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Restructuring Costs (Tables)
9 Months Ended
Sep. 30, 2023
Restructuring and Related Activities [Abstract]  
Restructuring Costs The following table summarizes the Company’s restructuring liabilities:
Nine Months Ended 
September 30,
(In millions)20232022
Balance at beginning of period$77 $43 
Additions related to merger integration and transition costs1044
Payments of merger-related restructuring costs(28)(13)
Balance at end of period$59 $74