Consolidated Balance Sheet Parentheticals (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Accounts Receivable [Abstract]
Accounts Receivable, Allowance	$ 1.1	$ 1.1
Common Stock [Abstract]
Common Stock, Par Value	$ 0us-gaap_CommonStockNoParValue	$ 0us-gaap_CommonStockNoParValue
Common Stock, Shares Authorized	80.0us-gaap_CommonStockSharesAuthorized	80.0us-gaap_CommonStockSharesAuthorized
Common Stock, Shares Outstanding	45.9us-gaap_CommonStockSharesOutstanding	41.4us-gaap_CommonStockSharesOutstanding

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A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that are expected to be uncollectible.

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Face amount per share of no-par value common stock.

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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