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Stock-Based Compensation (Narrative) (Details) shares in Thousands | 6 Months Ended
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Jun. 30, 2019 $ / shares item shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Number of types of PSU awards | item | 2
Stock Options And SOSARs [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Shares granted | 190
Weighted-average grant date fair value | $ / shares | $ 173.96
Granted, Weighted-Average Exercise Price | $ / shares | $ 590.60
Units forfeited | 23
Units expired | 50
Stock option exercises (shares) | 736
Stock Options And SOSARs [Member] | Vesting Period 1 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Vesting period | 2 years
Stock Options And SOSARs [Member] | Vesting Period 2 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Vesting period | 3 years
Restricted Stock Units [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Shares granted | 23
Weighted-average grant date fair value | $ / shares | $ 599.06
Units forfeited | 11
Units released | 45
Restricted Stock Units [Member] | Vesting Period 1 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Vesting period | 2 years
Restricted Stock Units [Member] | Vesting Period 2 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Vesting period | 3 years
Performance Shares [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Performance shares granted | 46
Weighted-average grant date fair value | $ / shares | $ 583.13
Units forfeited | 12
Performance Shares Grant 1 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Performance shares granted | 33
Vesting period | 3 years
Performance Shares Grant 2 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Performance shares granted | 13
Performance Shares Grant 2 [Member] | First Half Vested [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Vesting percentage | 40.00%
Performance Shares Grant 2 [Member] | Second Half Vested [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Vesting percentage | 60.00%
Minimum [Member] | Performance Shares [Member] | Vesting Period 1 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Vesting percentage | 0.00%
Maximum [Member] | Performance Shares [Member] | Vesting Period 1 [Member] |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Vesting percentage | 300.00%

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- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + 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 (a)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + 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)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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