Discontinued Operations (Details) (Kodiak, USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
Jun. 30, 2012	Dec. 31, 2012
Kodiak
Discontinued operations
Cash proceeds received	$ 9.5	$ 9.5
Gain on sale of discontinued operations		8.2
Summary of operating results included in income (loss) from discontinued operations
Income from discontinued operations	$ 5.2	$ 5.2

Amount of income (loss) from a disposal group, net of income tax before extraordinary items allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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