STOCK COMPENSATION - Stock Option Activity (Details) shares in Millions	12 Months Ended
	Dec. 31, 2020 $ / shares shares
Shares Subject to Option
Beginning balance (in shares) | shares	5.9
Exercised (in shares) | shares	1.6
Ending balance (in shares) | shares	4.3
Weighted Average Exercise Price
Beginning balance (in dollars per share) | $ / shares	$ 42.52
Exercised (in dollars per share) | $ / shares	41.13
Ending balance (in dollars per share) | $ / shares	$ 43.04