Stockholders' Equity - Initial Public Offering (Details) (USD $)	1 Months Ended
	May 31, 2012	May 17, 2012
Class of Stock
Selling stockholders shares sold		241,233,615
Net proceeds received from public offering	$ 6,800,000,000
Underwriting discounts and commissions	75,000,000
Offering expenses	$ 7,000,000
Class A Common Stock
Class of Stock
Number of shares issued	180,000,000
Common stock at a public offering price		38.00