EQUITY - NARRATIVE (Details) - USD ($)		1 Months Ended	9 Months Ended
	May 10, 2021	Aug. 31, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Dec. 31, 2017	Mar. 31, 2011
Class of Stock [Line Items]
Proceeds from stock options and employee stock purchase plan			$ 60,400,000
Stock offering, value (up to)		$ 1,000,000,000
Common stock, par value (in usd per share)	$ 0.01		$ 0.01		$ 0.01
Price per share (in usd per share)	$ 244.75
Treasury stock repurchased				$ 56,000,000.0
Accrued dividend RSU			$ 10,900,000
Paid dividend RSU			$ 7,500,000	$ 7,800,000
Over-Allotment Option
Class of Stock [Line Items]
Stock offerings (in shares)	900,000
Public Stock Offering
Class of Stock [Line Items]
Stock offerings (in shares)	9,000,000
Proceeds from sale of stock	$ 2,400,000,000
2020 ATM Program
Class of Stock [Line Items]
Stock offerings (in shares)			0
2011 Buyback
Class of Stock [Line Items]
Stock repurchase program, authorized amount							$ 1,500,000,000
Treasury stock activity (in shares)			14,361,283
Treasury stock repurchased			$ 1,500,000,000
2017 Buyback
Class of Stock [Line Items]
Stock repurchase program, authorized amount						$ 2,000,000,000
Treasury stock activity (in shares)			0