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Shareholders' Equity (Stock Options Outstanding And Exercisable) (Details) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Number of options outstanding (in shares)	15,706	15,813	16,712	18,069
Options outstanding, weighted average exercise price (in USD per share)	$ 47.43	$ 41.84	$ 37.63	$ 31.57
Options outstanding weighted average remaining contractual life, years	6 years 6 months
Number of options exercisable (in shares)	8,214	9,359
Exercisable shares, weighted avg. price (in USD per share)	$ 37.34
Exercise Price $14.62-21.05
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Lower range	14.62
Upper range	$ 21.05
Number of options outstanding (in shares)	843
Options outstanding, weighted average exercise price (in USD per share)	$ 15.79
Options outstanding weighted average remaining contractual life, years	2 years
Number of options exercisable (in shares)	843
Exercisable shares, weighted avg. price (in USD per share)	$ 15.79
Options exercisable, weighted average remaining contractual life, years	2 years
Exercise Price $22.45-23.86
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Lower range	$ 22.45
Upper range	$ 23.86
Number of options outstanding (in shares)	1,869
Options outstanding, weighted average exercise price (in USD per share)	$ 23.04
Options outstanding weighted average remaining contractual life, years	2 years 1 month 28 days
Number of options exercisable (in shares)	1,869
Exercisable shares, weighted avg. price (in USD per share)	$ 23.04
Options exercisable, weighted average remaining contractual life, years	2 years 1 month 28 days
Exercise Price $27.03-40.64
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Lower range	$ 27.03
Upper range	$ 40.64
Number of options outstanding (in shares)	2,945
Options outstanding, weighted average exercise price (in USD per share)	$ 37.24
Options outstanding weighted average remaining contractual life, years	4 years 6 months 25 days
Number of options exercisable (in shares)	2,072
Exercisable shares, weighted avg. price (in USD per share)	$ 35.81
Options exercisable, weighted average remaining contractual life, years	4 years 4 months 20 days
Exercise Price $45.99-53.16
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Lower range	$ 45.99
Upper range	$ 53.16
Number of options outstanding (in shares)	4,062
Options outstanding, weighted average exercise price (in USD per share)	$ 49.01
Options outstanding weighted average remaining contractual life, years	8 years 1 month 2 days
Number of options exercisable (in shares)	1,855
Exercisable shares, weighted avg. price (in USD per share)	$ 49.62
Options exercisable, weighted average remaining contractual life, years	7 years
Exercise Price $53.34-71.12
Share-based Payment Arrangement, Option, Exercise Price Range [Line Items]
Lower range	$ 53.34
Upper range	$ 71.12
Number of options outstanding (in shares)	5,987
Options outstanding, weighted average exercise price (in USD per share)	$ 63.43
Options outstanding weighted average remaining contractual life, years	8 years 4 months 9 days
Number of options exercisable (in shares)	1,575
Exercisable shares, weighted avg. price (in USD per share)	$ 53.40
Options exercisable, weighted average remaining contractual life, years	6 years 25 days

X

- 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.

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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.

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