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Restructuring Charges (Restructuring Liability) (Details) - Severance and Other Restructuring Liabilities
$ in Millions
3 Months Ended
Mar. 31, 2022
USD ($)
Restructuring Reserve [Roll Forward]  
Accrued balance at beginning of period $ 17
Cash Payments (5)
(Credits)/Other 0
Accrued balance at end of period $ 32