Common Equity Units (Common Equity Units) (Details) (USD $)	12 Months Ended				1 Months Ended					1 Months Ended	12 Months Ended		1 Months Ended		1 Months Ended		12 Months Ended			12 Months Ended				12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Sep. 30, 2013 Common Stock [Member]	Oct. 31, 2012 Common Stock [Member]	Dec. 31, 2013 Common Stock [Member]	Sep. 11, 2013 Common Stock [Member]	Oct. 10, 2012 Common Stock [Member]	Sep. 30, 2013 Senior Notes [Member] Debt Remarketing Series D [Member]	Dec. 31, 2013 Senior Notes [Member] Debt Remarketing Series D [Member]	Sep. 11, 2013 Senior Notes [Member] Debt Remarketing Series D [Member]	Oct. 31, 2012 Senior Notes [Member] Debt Remarketing Series C Tranche 1 [Member]	Oct. 04, 2012 Senior Notes [Member] Debt Remarketing Series C Tranche 1 [Member]	Oct. 31, 2012 Senior Notes [Member] Debt Remarketing Series C Tranche 2 [Member]	Oct. 04, 2012 Senior Notes [Member] Debt Remarketing Series C Tranche 2 [Member]	Dec. 31, 2013 Senior Notes [Member] Debt Remarketing Series C [Member]	Dec. 31, 2012 Senior Notes [Member] Debt Remarketing Series C [Member]	Dec. 31, 2010 Estimated Fair Value [Member]	Dec. 31, 2012 Series C Purchase Contract [Member]	Dec. 31, 2010 Series E Purchase Contract [Member]	Dec. 31, 2013 Series D Purchase Contract [Member]	Dec. 31, 2010 Alico Transaction [Member]	Dec. 31, 2013 Minimum [Member]	Dec. 31, 2013 Maximum [Member]
Temporary Equity Disclosure [Abstract]
Effective date of acquisition				Nov. 01, 2010
Equity Units, Shares Transferred				40,000,000
Equity Units Stated Interest Percentage				5.00%
Equity Units, Aggregate Purchase Price per Unit				$ 75
Common Stock, Par, Common Equity Units	$ 0.01	$ 0.01		$ 0.01
Equity Units, Purchase Price Per Contract Settlement				$ 25
Equity Units, Beneficial Interest Stated Percentage			2.50%
Weighted Average Share Price, Trading Day Periods				20 days
Equity Units, Stock Reference Price	$ 35.15
Equity Units, Stock Threshold Appreciation Price	$ 43.93
Proceeds from Purchase Contracts Settlement	1,000,000,000
Stock Purchase Contracts, Value at Issuance				247,000,000
Stock Purchase Contracts, Payments Made	48,000,000	84,000,000
Debt Instrument, Interest Rate, Average Stated				1.98%
Stock Purchase Contracts, Average Stated Interest Rate				3.02%
Issuance of stock purchase contracts related to common equity units				(69,000,000)
Class of Stock [Line Items]
Value of securities issued for business acquisition				3,000,000,000															3,200,000,000
Debt Security, Principle Amount																							1,000,000,000
Purchase Contract Settlement Date																				Oct. 10, 2012	Oct. 08, 2014	Sep. 11, 2013
Debt Instrument, Interest Rate, Stated Percentage											4.368%	4.368%		1.756%		3.048%
Debt Instrument, Maturity Date										Sep. 15, 2023	Sep. 15, 2023		Dec. 15, 2017		Dec. 15, 2022
Proceeds from remarketing																	0	0
Proceeds from issuance of common stock	$ 1,000,000,000	$ 1,000,000,000	$ 2,950,000,000		$ 1,000,000,000	$ 0
Common stock, shares issued	1,125,224,024	1,094,880,623					22,679,955	22,679,955	28,231,956
Stock Purchase Contracts, Maximum Shares of Common Stock issued from Settlement																								22,800,000	28,500,000