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Consolidated Balance Sheets (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Statement of Financial Position [Abstract]
Accounts Receivable, allowances (in dollars)	$ 19.4us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent	$ 18.2us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Common stock, shares authorized	300,000,000us-gaap_CommonStockSharesAuthorized	300,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued	163,175,928us-gaap_CommonStockSharesIssued	163,175,928us-gaap_CommonStockSharesIssued
Common stock, shares outstanding	135,543,869us-gaap_CommonStockSharesOutstanding	133,717,057us-gaap_CommonStockSharesOutstanding
Treasury stock, shares	27,632,059us-gaap_TreasuryStockShares	29,458,871us-gaap_TreasuryStockShares

X

- Definition

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

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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