Capital Stock (Schedule of Issued Repurchased and Outstanding Shares) (Details)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Common Stock, Shares Outstanding [Roll Forward]
Beginning balance, Shares Issued	2,805,961,317	2,805,961,317	2,805,961,317
Beginning balance, Shares Repurchased	(796,221,021)	(761,542,032)	(717,221,651)
Beginning balance, Shares Outstanding	2,009,740,296	2,044,419,285	2,088,739,666
Stock award activity	391,899	181,011	5,004,502
Repurchase of common stock, shares	(16,652,913)	(34,860,000)	(49,324,883)
Ending balance, Shares Issued	2,805,961,317	2,805,961,317	2,805,961,317
Ending balance, Shares Repurchased	(812,482,035)	(796,221,021)	(761,542,032)
Ending balance, Shares Outstanding	1,993,479,282	2,009,740,296	2,044,419,285