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STOCKHOLDERS’ EQUITY AND REDEEMABLE NONCONTROLLING INTEREST (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended						6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019	Jul. 01, 2015
Schedule of Stockholders' Equity and Redeemable Noncontrolling Interest [Line Items]
Dividends per common share	$ 0.56	$ 0.56	$ 0.53	$ 0.53	$ 0.53	$ 0.53
Share repurchase authorization remaining available	$ 1,200						$ 1,200
Purchases of treasury stock, value					$ 50		$ 75	$ 100
Reissuance of shares for employee benefit plan							1.7	1.2
UMass Joint Venture
Schedule of Stockholders' Equity and Redeemable Noncontrolling Interest [Line Items]
Ownership percentage by noncontrolling owners									18.90%
Treasury Stock, at Cost [Member]
Schedule of Stockholders' Equity and Redeemable Noncontrolling Interest [Line Items]
Purchases of treasury stock- shares							0.7	1.1
Purchases of treasury stock, value					$ 50		$ 75	$ 100

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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