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TRANSFORMATION STRATEGY (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Restructuring and Related Activities [Abstract]    
Compensation and benefits $ 76 $ 12
Total other expenses 42 33
Total Transformation Strategy Costs 118 45
Income Tax Benefit from Transformation Strategy Costs (28) (10)
After Tax Transformation Strategy Costs $ 90 $ 35