Stock Benefit Plans (The Status Of Stock Option Awards) (Details) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2015 USD ($) $ / shares shares
Options, Outstanding [Roll Forward]
Number of options outstanding at January 1, 2015 (in shares) | shares	17,995,082
Number of Options Granted (in shares) | shares	1,574,706
Number of Options Exercised (in shares) | shares	(4,607,079)
Number of Options Forfeited (in shares) | shares	(131,126)
Number of options Expired (in shares) | shares	(54,779)
Number of options outstanding at December, 31 2015 (in shares) | shares	14,776,804
Options vested or expected to vest at December 31, 2015 (in shares) | shares	14,584,291
Options exercisable at December 31, 2015 (in shares) | shares	10,104,569
Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted Average Exercise Price per option at January 1, 2015 | $ / shares	$ 30.97
Weighted Average Exercise Price per option Granted | $ / shares	56.84
Weighted Average Exercise Price per option Exercised | $ / shares	29.24
Weighted Average Exercise Price per Option Forfeited | $ / shares	46.43
Weighted Average Exercise Price per Option Expired | $ / shares	30.45
Weighted Average Exercise Price per option at December 31, 2015 | $ / shares	34.14
Weighted Average Exercise Price per option expected to vest | $ / shares	34.04
Weighted Average Exercise Price per option exercisable at closing | $ / shares	$ 28.88
Weighted Average Remaining Contractual Term at closing, years	5 years 4 months 24 days
Weighted Average Remaining Contractual Term expected to vest, years	5 years 4 months 24 days
Weighted Average Remaining Contractual Term exercisable at closing, years	4 years 3 months 18 days
Aggregate Intrinsic Value at closing | $	$ 328,225
Aggregate Intrinsic Value expected to vest | $	325,388
Aggregate Intrinsic Value exercisable at closing | $	$ 276,975