Consolidated Balance Sheets Parenthetical (USD $) In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Allowance for Doubtful Accounts Receivable, Current	$ 10.0	$ 8.2
Par value	$ 1	$ 1
Shares authorized	100us-gaap_CommonStockSharesAuthorized	100us-gaap_CommonStockSharesAuthorized
Shares issued and outstanding	48.6us-gaap_CommonStockSharesOutstanding	48.4us-gaap_CommonStockSharesOutstanding

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 or stated value per share of 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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