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Shareholders' Equity (Stock Options Outstanding And Exercisable) (Details) - $ / shares | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |  |
Number of options outstanding (in shares) | 15,813,000 | 16,712,000 | 18,069,000 | 19,237,000
Options outstanding, weighted average exercise price (in USD per share) | $ 41.84 | $ 37.63 | $ 31.57 | $ 28.71
Options outstanding weighted average remaining contractual life, years | 6 years 3 months 26 days |  |  |
Number of options exercisable (in shares) | 9,359,000 | 10,624,000 | 6,692,000 |
Exercisable shares, weighted avg. price (in USD per share) | $ 32.89 |  |  |
Exercise Price $14.62-21.05 |  |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |  |
Lower range | 14.62 |  |  |
Upper range | $ 21.05 |  |  |
Number of options outstanding (in shares) | 1,996,000 |  |  |
Options outstanding, weighted average exercise price (in USD per share) | $ 16.63 |  |  |
Options outstanding weighted average remaining contractual life, years | 2 years 32 days |  |  |
Number of options exercisable (in shares) | 1,996,000 |  |  |
Exercisable shares, weighted avg. price (in USD per share) | $ 16.63 |  |  |
Options exercisable, weighted average remaining contractual life, years | 2 years 32 days |  |  |
Exercise Price $22.45-23.86 |  |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |  |
Lower range | $ 22.45 |  |  |
Upper range | $ 23.86 |  |  |
Number of options outstanding (in shares) | 2,379,000 |  |  |
Options outstanding, weighted average exercise price (in USD per share) | $ 23.13 |  |  |
Options outstanding weighted average remaining contractual life, years | 3 years 15 days |  |  |
Number of options exercisable (in shares) | 2,379,000 |  |  |
Exercisable shares, weighted avg. price (in USD per share) | $ 23.13 |  |  |
Options exercisable, weighted average remaining contractual life, years | 3 years 15 days |  |  |
Exercise Price $27.03-40.64 |  |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |  |
Lower range | $ 27.03 |  |  |
Upper range | $ 40.64 |  |  |
Number of options outstanding (in shares) | 3,332,000 |  |  |
Options outstanding, weighted average exercise price (in USD per share) | $ 37.10 |  |  |
Options outstanding weighted average remaining contractual life, years | 5 years 6 months 15 days |  |  |
Number of options exercisable (in shares) | 2,390,000 |  |  |
Exercisable shares, weighted avg. price (in USD per share) | $ 35.70 |  |  |
Options exercisable, weighted average remaining contractual life, years | 5 years 4 months 10 days |  |  |
Exercise Price $45.99-53.16 |  |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |  |
Lower range | $ 45.99 |  |  |
Upper range | $ 53.16 |  |  |
Number of options outstanding (in shares) | 4,268,000 |  |  |
Options outstanding, weighted average exercise price (in USD per share) | $ 49.01 |  |  |
Options outstanding weighted average remaining contractual life, years | 9 years 23 days |  |  |
Number of options exercisable (in shares) | 908,000 |  |  |
Exercisable shares, weighted avg. price (in USD per share) | $ 49.61 |  |  |
Options exercisable, weighted average remaining contractual life, years | 8 years |  |  |
Exercise Price $53.34-71.12 |  |  |  |
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items] |  |  |  |
Lower range | $ 53.34 |  |  |
Upper range | $ 71.12 |  |  |
Number of options outstanding (in shares) | 3,838,000 |  |  |
Options outstanding, weighted average exercise price (in USD per share) | $ 62.69 |  |  |
Options outstanding weighted average remaining contractual life, years | 8 years 1 month 40 days |  |  |
Number of options exercisable (in shares) | 1,686,000 |  |  |
Exercisable shares, weighted avg. price (in USD per share) | $ 53.36 |  |  |
Options exercisable, weighted average remaining contractual life, years | 7 years 7 days |  |  |

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- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option 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)(1)(iii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option 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)(1)(iii) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Number of options outstanding, including both vested and non-vested options. + 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 -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: 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=109197908&loc=d3e5070-113901 + 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=109197908&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, 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 -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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