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ACQUISITIONS (Details)
£ / shares in Units, £ in Millions, $ in Millions
1 Months Ended 9 Months Ended
Jul. 29, 2021
GBP (£)
£ / shares
Dec. 31, 2020
USD ($)
Jun. 30, 2021
USD ($)
NWPS      
Business Acquisition [Line Items]      
Goodwill, acquired during period   $ 139  
Intangible assets acquired   $ 96  
Intangible asset useful life   24 years 9 months 18 days  
Financo      
Business Acquisition [Line Items]      
Goodwill, acquired during period     $ 30
Intangible assets acquired     $ 9
Intangible asset useful life     9 months
Tax deductible period     15 years
Charles Stanley | Subsequent Event      
Business Acquisition [Line Items]      
Share price (in dollars per share) | £ / shares £ 5.15    
Consideration | £ £ 279