Long-term Debt Long-term Debt (Credit Facilities) (Narrative) (Details) (USD $)			6 Months Ended
	Dec. 31, 2013 General Credit Facility One [Member]	Dec. 31, 2013 General Credit Facility Two [Member]	Jun. 30, 2014 General Credit Facility Three [Member]	May 30, 2014 General Credit Facility Three [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,000,000,000	$ 3,000,000,000		$ 4,000,000,000
Line of Credit Facility, Expiration Date			May 30, 2019
Line of Credit Facility, Commitment Fee Amount			$ 6,000,000