Capital Stock Transactions (Tables)

12 Months Ended

Dec. 31, 2012

Capital Stock Transactions [Abstract]

Schedule Of Capital Stock Repurchases

		For the Years Ended December 31,
		2012		2011		2010
Shares repurchased		932,706		2,602,513		1,648,047
Weighted average price per share	$	64.87	$	55.28	$	63.14