Stock-Based Compensation Plans (Schedule Of Company's Stock Option Plans) (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2016 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of Shares, Options outstanding Beginning Balance | shares	2,670
Number of Shares, Granted | shares	1,053
Number of Shares, Exercised | shares	(850)
Number of Shares, Canceled | shares	(149)
Number of Shares, Options outstanding Ending Balance | shares	2,724
Number of Shares, Options exercisable Ending Balance | shares	860
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted Average Exercise Price, Options outstanding Beginning Balance | $ / shares	$ 53.69
Weighted Average Exercise Price, Granted | $ / shares	43.57
Weighted Average Exercise Price, Exercised | $ / shares	48.24
Weighted Average Exercise Price, Canceled | $ / shares	55.21
Weighted Average Exercise Price, Options outstanding Ending Balance | $ / shares	51.41
Weighted Average Exercise Price, Options exercisable Ending Balance | $ / shares	$ 53.73
Weighted Average Remaining Life (Years), Options outstanding	6 years 9 months
Weighted Average Remaining Life (Years), Options exercisable	3 years 10 months 28 days