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Employee Benefit Plans (Assets Held In Trust) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Assets held-in-trust	$ 42.6	$ 45.8
Corporate-Owned Life Insurance Policies [Member]
Assets held-in-trust	41.9	44.4
Cash and Cash Equivalents [Member]
Assets held-in-trust	$ 0.7	$ 1.4

The total amount of cash and securities held by third party trustees pursuant to terms of debt instruments or other agreements as of the date of each statement of financial position presented, which can be used by the trustee only to pay the noncurrent portion of specified obligations.

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