SHAREHOLDERS' EQUITY (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended				3 Months Ended		9 Months Ended		12 Months Ended
	Jun. 30, 2017	Feb. 28, 2017	May 31, 2016	Feb. 29, 2016	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016	Feb. 28, 2015
Shareholder's Equity
Common stock, par value per share (in dollars per share)					$ 1.00		$ 1.00		$ 1.00
Common stock, shares authorized					800,000,000		800,000,000		800,000,000
Dividends declared per common share (in dollars per share)					$ 0.370	$ 0.350	$ 1.110	$ 1.050
Common Stock
Shareholder's Equity
Common stock, shares authorized to be repurchased										20,000,000
Remaining shares authorized to be repurchased					12,358,110		12,358,110
Amount of common stock to be repurchased under ASR agreement		$ 300		$ 300
Shares received under ASR agreement	286,620	2,077,224	232,012	2,459,490
Shares received under the ASR agreement compared to the shares the company expected to receive (as a percent)		85.00%		85.00%
Reacquired shares							4,614,646		6,483,198
Number of shares reacquired through the open market or private purchases							4,414,416		6,126,033
Number of shares that have been repurchased through the exercise of stock options and vesting of stock awards							200,230		357,165