Supplemental Balance Sheet Data (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Inventories by major class:
Raw materials	$ 25.9us-gaap_InventoryRawMaterials	$ 28.5us-gaap_InventoryRawMaterials
Work in progress	20.8us-gaap_InventoryWorkInProcess	23.2us-gaap_InventoryWorkInProcess
Finished goods	66.6us-gaap_InventoryFinishedGoods	67.1us-gaap_InventoryFinishedGoods
Supplies and other	5.7us-gaap_OtherInventorySupplies	6.5us-gaap_OtherInventorySupplies
Inventories, gross	119.0us-gaap_InventoryGross	125.3us-gaap_InventoryGross
Adjust FIFO inventories to LIFO cost	(13.4)us-gaap_InventoryLIFOReserve	(14.0)us-gaap_InventoryLIFOReserve
Total	105.6us-gaap_InventoryNet	111.3us-gaap_InventoryNet
FIFO values of inventories valued on the LIFO method	$ 94.9us-gaap_FIFOInventoryAmount	$ 95.7us-gaap_FIFOInventoryAmount

The amount of FIFO (first in first out) inventory present at the reporting date when inventory is also valued using different valuation methods.

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Amount of difference between inventory at lower of LIFO cost or market and inventory at lower of other inventory accounting method cost or market, for example, but not limited to, FIFO or average cost.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of other supplies used within the manufacturing or production process expected to be consumed within one year or operating cycle, if longer.

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