Stock Compensation (Summary Of Option Activity During The Period) (Details) shares in Thousands	12 Months Ended
	Dec. 31, 2015 $ / shares shares
Equity [Abstract]
Shares under option at beginning of period | shares	11,113
Shares under option, Granted | shares	1,793
Shares under option, Exercised | shares	(984)
Shares under option, Forfeited or expired | shares	(269)
Shares under option at end of period | shares	11,653
Shares under option, Exercisable | shares	7,307
Weighted-average exercise price of Shares under option at beginning of period (in dollars per share) | $ / shares	$ 29.91
Weighted-average exercise price of Shares under option, Granted (in dollars per share) | $ / shares	46.92
Weighted-average exercise price of Shares under option, Exercised (in dollars per share) | $ / shares	28.42
Weighted-average exercise price of Shares under option, Forfeited or expired (in dollars per share) | $ / shares	35.62
Weighted-average exercise price of Shares under option at end of period (in dollars per share) | $ / shares	32.52
Weighted-average exercise price of Shares under option, Exercisable (in dollars per share) | $ / shares	$ 29.29