Fair Value (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012
Fair Value Disclosures [Abstract]
Long-term Debt, Fair Value	$ 983.7	$ 741.0
Debt carrying value	$ 987.7	$ 706.9	[1]

[1] Book values include unamortized discounts, as applicable.