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TRANSFORMATION STRATEGY (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Restructuring and Related Activities [Abstract]        
Compensation and benefits $ 55 $ 81 $ 131 $ 93
Total other expenses 61 31 103 64
Total Transformation Strategy Costs 116 112 234 157
Income Tax Benefit from Transformation Strategy Costs (28) (29) (56) (39)
After Tax Transformation Strategy Costs $ 88 $ 83 $ 178 $ 118