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Restructuring Charges (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Dec. 31, 2021
Restructuring Cost and Reserve [Line Items]          
Restructuring charges $ 12 $ 1 $ 12 $ 2  
Restructuring charges, net of tax 9   9 1  
Operating lease, impairment loss 11   11    
Severance Costs 1   1 1  
Accelerated depreciation related to disposal of technology systems       $ 1  
Restructuring charges accrued $ 1   $ 1    
Maximum [Member]          
Restructuring Cost and Reserve [Line Items]          
Restructuring charges, net of tax   $ 1      
Restructuring charges accrued         $ 1