Schedule II. Condensed Financial Information of Registrant (Parent Company) (Schedule II. Condensed Financial Information of Registrant (Narrative)) (Details) - Parent Company [Member] - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Guarantor Obligations, Current Carrying Value	$ 5	$ 5
Guarantor Obligations, Maximum Exposure, Undiscounted	2,000
Indemnification Agreement [Member]
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 625