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Restructuring and Impairment Charges (Tables)
12 Months Ended
Dec. 31, 2022
Restructuring and Related Activities [Abstract]  
Summary of severance accrual
A summary of our severance accrual at December 31, 2022, is as follows ($ in millions):
Balance in severance accrual as of December 31, 2021$
Payments made to terminated employees(3)
Balance in severance accrual as of December 31, 2022$—