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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

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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