Capital Stock (Rollforward Of Common Stock Activity) (Details) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Class of Stock [Line Items]
Common stock, ending balance	448,900	447,200
Treasury stock, ending balance	28,734	10,868
Common Stock Issued [Member]
Class of Stock [Line Items]
Common stock, beginning balance	447,222	439,894	438,872
Issuance of stock for various plans, net	1,632	7,328	1,022
Repurchase of stock, common shares	0	0	0
Common stock, ending balance	448,854	447,222	439,894
Treasury Stock [Member]
Class of Stock [Line Items]
Treasury stock, beginning balance	10,868	13	1,921
Stock Issued During Period, Shares, Period Increase (Decrease)	(4,668)	(533)	(2,994)
Repurchase of stock, treasury stock	22,534	11,388	1,086
Treasury stock, ending balance	28,734	10,868	13