Equity (Common Stock - Narrative) (Details) (USD $)	12 Months Ended			1 Months Ended					12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2013 Common Class A [Member]	Oct. 31, 2012 Common Class A [Member]	Dec. 31, 2013 Common Class A [Member]	Sep. 11, 2013 Common Class A [Member]	Oct. 10, 2012 Common Class A [Member]	Dec. 31, 2011 Repurchase Convertible Preferred Stock [Member]	Dec. 31, 2012 October 2012 Common Stock Issuance [Member]	Dec. 31, 2013 Treasury Shares Issued For Stock Options [Member]	Dec. 31, 2012 Treasury Shares Issued For Stock Options [Member]	Dec. 31, 2011 Treasury Shares Issued For Stock Options [Member]	Dec. 31, 2013 Common Shares Issued For Stock Options [Member]	Dec. 31, 2012 Common Shares Issued For Stock Options [Member]	Dec. 31, 2011 Common Shares Issued For Stock Options [Member]	Dec. 31, 2013 September 2013 Common Stock Issuance [Member]
Business Acquisition [Line Items]
Common Stock, Shares, Issued	1,125,224,024	1,094,880,623				22,679,955	22,679,955	28,231,956
Common stock, shares issued									68,570,000	28,231,956				7,663,446	5,497,752	3,549,211
Price per share of common stock issued									$ 43.25
Fair Value of Stock Issued			$ 2,805,000,000
Proceeds from issuance of common stock	1,000,000,000	1,000,000,000	2,950,000,000	1,000,000,000	0				3,000,000,000	1,000,000,000							1,000,000,000
Issuance costs									16,000,000
Issued Treasury Stock											0	0	0
Cost of shares issued	305,000,000	229,000,000	215,000,000											250,000,000	171,000,000	115,000,000
Equity, Class of Treasury Stock [Line Items]
Repurchase amount outstanding	$ 1,300,000,000
Repurchase Shares	0	0	0