Shareholders' Equity (Details) (USD $)	9 Months Ended	12 Months Ended
	Sep. 30, 2012	Dec. 31, 2000
Stockholders' Equity Note [Abstract]
Treasury Stock, Value, Acquired, Cost Method	$ 0
Stock Repurchase Program, Authorized Amount		3,000,000,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 419,200,000