Subsequent Events (Details)	1 Months Ended	12 Months Ended
	Jan. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2010 USD ($)	Feb. 13, 2013 VEB	Mar. 31, 2012 USD ($)	Jan. 11, 2010 VEB	Dec. 31, 2012 Private Placement [Member] USD ($)
Subsequent Event [Line Items]
Notional Amount Related to Discontinuation of Interest Rate Fair Value Hedge	$ 1,000,000,000					$ 350,000,000
Interest rate swap termination	88,100,000	43,600,000	0	0
Venezuela foreign currency devaluation					32.00%
Maximum Venezuela currency exchange rate for non essential goods and services							4.30
Maximum Venezuela currency exchange rate					6.30
Notes Payable, Noncurrent								535,000,000
Private Notes prepayment percent		100.00%
Private Notes accrued interest to be paid March 2013		7,000,000
Private Notes Make Whole Premium		$ 65,000,000