EARNINGS PER COMMON SHARE - Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Earnings Per Share [Abstract]
Weighted average number of shares outstanding - basic (in shares)	388.6	434.2
Effect of dilutive securities common shares, employee stock awards (in shares)	3.1	0.0
Diluted (in shares)	391.7	434.2
Net income (loss)	$ 639	$ (1,400)
Less: Net income (loss) attributable to the noncontrolling interest	66	88
Net income (loss) attributable to Holdings	573	(1,488)
Less: Preferred stock dividends	14	13
Net income (loss) available to Holdings’ common shareholders	559	(1,501)
Net income (loss) available to Holdings’ common shareholders	$ 559	$ (1,501)
Net income (loss) attributable to Holdings per common share:
Basic (in dollars per share)	$ 1.44	$ (3.46)
Diluted (in dollars per share)	$ 1.43	$ (3.46)
Effect of dilutive securities (in shares)		4.3