CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (Parenthetical) - shares	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017
CONSOLIDATED STATEMENT OF CHANGES IN EQUITY
Common stock issued under employee plans (in shares)	2,877,775	2,945,036
Purchases of treasury stock under employee plans (in shares)	946,596	920,968
Sales of treasury stock under employee plans (in shares)	351,491	347,939
Other treasury shares purchased, not retired (in shares)	11,693,706	16,299,114

Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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