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Share-Based Compensation Plans (Share Options Outstanding And Exercisable) (Details) - $ / shares | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2018
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items] |  |
Options Outstanding, Number Outstanding | 170,704 | 170,704
Options Outstanding, Weighted Average-Remaining Contractual Life | 1 year 4 months 24 days |
Options Outstanding, Weighted Average Exercise Price | $ 87.18 | $ 87.18
Exercise Prices Range 1 [Member] |  |
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items] |  |
Ranges of Exercise Prices, Lower range limit | 84.6300 |
Ranges of Exercise Prices, Upper range limit | $ 85.6300 |
Options Outstanding, Number Outstanding | 31,100 | 31,100
Options Outstanding, Weighted Average-Remaining Contractual Life | 2 months 12 days |
Options Outstanding, Weighted Average Exercise Price | $ 84.63 | $ 84.63
Exercise Prices Range 2 [Member] |  |
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items] |  |
Ranges of Exercise Prices, Lower range limit | 85.6400 |
Ranges of Exercise Prices, Upper range limit | $ 87.4700 |
Options Outstanding, Number Outstanding | 59,900 | 59,900
Options Outstanding, Weighted Average-Remaining Contractual Life | 1 year 2 months 12 days |
Options Outstanding, Weighted Average Exercise Price | $ 86.62 | $ 86.62
Exercise Prices Range 3 [Member] |  |
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items] |  |
Ranges of Exercise Prices, Lower range limit | 87.4800 |
Ranges of Exercise Prices, Upper range limit | $ 89.4100 |
Options Outstanding, Number Outstanding | 73,750 | 73,750
Options Outstanding, Weighted Average-Remaining Contractual Life | 2 years 1 month 6 days |
Options Outstanding, Weighted Average Exercise Price | $ 88.32 | $ 88.32
Exercise Prices Range 4 [Member] |  |
Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range [Line Items] |  |
Ranges of Exercise Prices, Lower range limit | 89.4200 |
Ranges of Exercise Prices, Upper range limit | $ 110.1300 |
Options Outstanding, Number Outstanding | 5,954 | 5,954
Options Outstanding, Weighted Average-Remaining Contractual Life | 1 year 6 months |
Options Outstanding, Weighted Average Exercise Price | $ 91.99 | $ 91.99

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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 floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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