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Restructuring Costs
 12 Months Ended
Dec. 31, 2023
Restructuring and Related Activities [Abstract]  
Restructuring Costs Restructuring Costs
During 2023, 2022 and 2021, the Company recognized $12 million, $52 million and $44 million, respectively, of restructuring costs that are primarily related to workforce reductions and associated severance benefits that were triggered by the Merger. The following table summarizes the Company’s restructuring liabilities:
Year Ended December 31,
(In millions)202320222021
Balance at beginning of period$77 $43 $— 
Additions related to merger integration12 5244
Reductions related to severance payments(42)(18)(1)
Balance at end of period$47 $77 $43