Subsequent Events (Narrative) (Details) (USD $)	6 Months Ended	8 Months Ended	1 Months Ended
	May 31, 2013	May 31, 2013	Jun. 30, 2013 Share Repurchase Program [Member]
Subsequent Event [Line Items]
Stock repurchase amount			$ 100,000,000
Additional authorized amount			10,000,000
Authorized amount for share repurchase programs	350,000,000		360,000,000
Common stock repurchased and retired	$ 169,500,000	$ 250,000,000