STOCK COMPENSATION - Performance Shares Narrative (Details) $ / shares in Units, $ in Millions	1 Months Ended		12 Months Ended
	Feb. 28, 2022 $ / shares shares	Feb. 28, 2021 $ / shares shares	Dec. 31, 2021 USD ($) type $ / shares shares	Dec. 31, 2020 $ / shares shares	Dec. 31, 2019 $ / shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares converted (in shares)		2,500,000
Shares converted (in dollars per share) | $ / shares		$ 60.10
Subsequent Event
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares converted (in shares)	2,500,000
Shares converted (in dollars per share) | $ / shares	$ 66.57
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of performance share units issued under performance share plan			3 years	3 years
Minimum percentage of transfer performance shares to common stock based on actual total shareholder return			0.00%
Maximum percentage of transfer performance shares to common stock based on actual total shareholder return			200.00%
Number of types of PSUs | type			3
Performance share units, unvested (in shares)			2,200,000	2,200,000
Equity instrument, granted (in shares)			1,300,000
Equity instruments, vested (in shares)			1,300,000
Unrecognized compensation cost | $			$ 32
Total unrecognized compensation cost related to award, weighted average period			19 months
EPS-based and ROE-based Performance Share Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period of performance share units issued under performance share plan			3 years
Equity instrument granted in period, weighted average grant date fair value (in dollars per share) | $ / shares			$ 59.49	$ 68.42	$ 49.38