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Share-Based Compensation Plans Share-Based Compensation Plans (Details 4) - Employee Stock Purchase Plan - $ / shares | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
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Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Shares granted and exercised | 160,000 | 192,000,000 | 178,000,000
Weighted average exercise plan (in usd per share) | $ 66.72 | $ 56.17 | $ 63.93

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- Definition Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Granted and Exercised + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The weighted average of per share prices paid for shares purchased on the open market for issuance to employees under the plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5047-113901 + Details
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- Details
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