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Long-Term Debt -2019 Senior Notes (Details) (2019 Senior Notes, due 2019 [Member], USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
2019 Senior Notes, due 2019 [Member]
Debt Instrument [Line Items]
Long-term Debt, stated interest rate	8.50%
2019 Senior Notes, amount issued	$ 130.0
Premium, percentage of par value	104.375%
Premium, par value	5.7
Debt, short-term and long-term	1,305.0	1,175.0
Premium, unamortized	$ 5.4	$ 0

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer.

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