Share-Based Awards (Summary Of Stock Appreciation Right Transactions) (Details) - Stock Appreciation Rights (SARs) [Member] - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]
Options outstanding, beginning of period	176
Options granted	12
Options exercised	(26)
Options forfeited	0
Options outstanding, beginning of period	162	176
Exercisable, end of period	137
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instrument Other Than Options Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted-Average Price, Options outstanding, beginning of period	$ 30
Weighted-Average Price, Options granted	63
Weighted-Average Price, Options exercised	26
Weighted-Average Price, Options forfeited	0
Weighted-Average Price, Options outstanding, beginning of period	33	$ 30
Weighted-Average Price, Exercisable, end of period	28
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity, Nonvested, Weighted Average Grant Date Fair Value	$ 13	$ 14	$ 12