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STOCKHOLDERS’ EQUITY AND REDEEMABLE NONCONTROLLING INTEREST (Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 2 Months Ended | 3 Months Ended | 5 Months Ended | 6 Months Ended | 9 Months Ended |
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Jun. 30, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Sep. 30, 2016 | Jun. 30, 2016 | Sep. 30, 2016 | Sep. 30, 2015 | Jul. 01, 2015
Schedule of Stockholders' Equity and Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends per common share |  | $ 0.40 | $ 0.40 | $ 0.40 | $ 0.38 | $ 0.38 | $ 0.38 | $ 0.38 |  |  | $ 1.2 | $ 1.14 |
Share repurchase authorization remaining available |  | $ 532 |  |  |  |  |  |  | $ 532 |  | $ 532 |  |
Purchases of treasury stock, value |  |  |  |  |  |  |  |  |  |  | $ 440 | $ 174 |
Reissuance of shares for employee benefit plan |  |  |  |  |  |  |  |  |  |  | 1.4 | 1.3 |
UMass Joint Venture [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Stockholders' Equity and Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Ownership percentage by noncontrolling owners |  |  |  |  |  |  |  |  |  |  |  |  | 18.90%
Redeemable noncontrolling interest, consideration |  |  |  |  |  |  |  |  |  |  |  |  | $ 68
Accelerated Share Repurchase Program [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Stockholders' Equity and Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Purchases of treasury stock, value |  |  |  |  |  |  |  |  | $ 250 |  |  |  |
Treasury Stock, at Cost |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Stockholders' Equity and Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Purchases of treasury stock- shares |  |  |  |  |  |  |  |  |  |  | 5.7 | 2.4 |
Purchases of treasury stock, value |  |  |  |  |  |  |  |  |  |  | $ 440 | $ 174 |
Treasury Stock, at Cost | Accelerated Share Repurchase Program [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Schedule of Stockholders' Equity and Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Purchases of treasury stock- shares | 2.8 | 0.3 |  |  |  |  |  |  | 3.1 |  |  |  |
Treasury stock acquired accelerated share repurchase, final purchase price, per share |  |  |  |  |  |  |  |  | $ 81.04 |  |  |  |
Stockholders' equity, decrease |  | $ 38 |  |  |  |  |  |  |  | $ 212 |  |  |

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- Definition Final price paid per share for the purchase of the targeted number of shares, determined by an average market price over a fixed period of time. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 25 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6405686&loc=d3e22802-112653 + Details
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