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REDEEMABLE NONCONTROLLING INTERESTS IN EQUITY OF CONSOLIDATED SUBSIDIARIES - Changes in Redeemable Noncontrolling Interests (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Changes in redeemable noncontrolling interests in equity of consolidated subsidiaries    
Distributions paid to noncontrolling interests $ (40) $ (37)
Redeemable noncontrolling interests    
Changes in redeemable noncontrolling interests in equity of consolidated subsidiaries    
Balances at beginning of period 1,506 1,420
Net income 34 47
Distributions paid to noncontrolling interests (36) (37)
Accretion of redeemable noncontrolling interests 1 5
Purchases and sales of businesses and noncontrolling interests, net 21 4
Balances at end of period $ 1,526 $ 1,439