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CONSOLIDATED STATEMENT OF EQUITY (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Statement of Stockholders' Equity [Abstract]
Cash dividends declared on common stock, per share	$ 1.00	$ 0.96	$ 0.92
Stock incentive programs and related tax withholdings, shares	0.3	0.3	1.0
Purchase of common stock, shares	0	5.0	1.5

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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