Related Party (Debt Agreements) (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Related Party Transactions [Abstract]
Line of Credit Facility, Maximum Borrowing Capacity	$ 2,000,000,000		$ 2,000,000,000
Interest Expense, Short-term Borrowings	5,000	114,000	89,000	282,000
Prudential Financial Debt, Interest Rate			4.49%
Prudential Financial Debt, Repayment Amount					200,000,000
Long-term debt with PFI	400,000,000		400,000,000		400,000,000
Long-term debt interest expense	4,000,000	7,000,000	13,000,000	20,000,000
Pru Funding Debt Repayment					$ 28,000,000