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Restructuring Charges (Tables)
 9 Months Ended
Sep. 30, 2021
Restructuring and Related Activities [Abstract]  
Rollforward of Restructuring Charges
The following table presents our restructuring liability activity during the period:
($ in millions)Employee termination benefits
Balance at December 31, 2020$143 
Charges9 
Cash payments(116)
Other(3)
Balance at September 30, 2021, classified in “Accrued expenses and other”
$33