Long-term Debt - Non-U.S. Bank Debt (Details) (Foreign Debt [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Foreign Debt [Member]
Short-term Debt [Line Items]
Foreign Debt, Amount Outstanding	$ 10.4	$ 4.8
Foreign Debt, Percentage Average Interest Rate	3.10%	3.20%