Capital Stock (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Equity, Class of Treasury Stock [Line Items]
Shares authorized	800,000,000
Common stock stated value per share	$ 0.01
Common shares outstanding	219,960,000	226,100,000
Stock repurchased	8,200,000
Weighted-average cost per share repurchased	$ 59
Stock repurchase program, covenant percentage	1.00%
Preferred stock shares authorized	2,000,000
Preferred stock stated value per share	$ 1.00
Preferred stock, shares outstanding	0
2007 Authorization [Member]
Equity, Class of Treasury Stock [Line Items]
Common stock repurchase authorization value	20,000,000.0