REDEEMABLE NONCONTROLLING INTEREST - Summary of Redeemable Noncontrolling Interest (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balance, beginning of period	[1],[2]			$ 365
Net earnings (loss) attributable to redeemable noncontrolling interests		$ 74	$ 68	197	$ 201
Balance, end of period	[1],[2]	95		95
Redeemable Noncontrolling Interest
Stockholders' Equity Attributable to Noncontrolling Interest [Roll Forward]
Balance, beginning of period		87	257	365	187
Net earnings (loss) attributable to redeemable noncontrolling interests		1	7	(4)	26
Purchase/change of redeemable noncontrolling interests		7	74	(266)	125
Balance, end of period		$ 95	$ 338	$ 95	$ 338

[1] See Note 12 for details of Redeemable noncontrolling interest.

[2] See Note 2 for details of balances with variable interest entities.