CONDENSED CONSOLIDATED STATEMENT OF EQUITY (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	9 Months Ended
Sep. 30, 2012	Sep. 30, 2011
Statement of Stockholders' Equity [Abstract]
Unrecognized gain reclassified to earnings, tax	$ 0.1	$ 0.3
Pension and other postretirement liability adjustment, tax effect	$ 9.0	$ 6.8
Cash dividends declared on common stock, per share	$ 0.75	$ 0.72
Stock incentive programs and related tax withholdings, shares	301,689	252,492
Purchase of common stock, shares		5,000,000

Tax effects of the increase (decrease) to accumulated comprehensive income during the period related to benefit plans. While for technical reasons this element has no balance attribute, the default assumption is a credit balance consistent with its label.

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Tax effect on reclassification adjustment for accumulated gains and losses from derivative instrument designated and qualifying as the effective portion of cash flow hedges included in accumulated comprehensive income that was realized in net income during the period.

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- Definition

Number of shares (or other type of equity) issued during the period as a result of any equity-based compensation plan other than an employee stock ownership plan (ESOP), net of any shares forfeited. Shares issued could result from the issuance of restricted stock, the exercise of stock options, stock issued under employee stock purchase plans, and/or other employee benefit plans.

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