Stockholders' Equity and Earnings Per Share (Details Textuals) (USD $) In Millions, except Per Share data	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Equity, Class of Treasury Stock [Line Items]
Amount used to repurchase common stock	$ 262.9
Stockholders' Equity and Earnings Per Share (Textuals)
Current quarterly dividend per share	$ 0.22
Cash dividends declared	151.1	145.3
Quarterly dividend payable	75.3		76.7
Repurchase of common stock	262.9	1.4
Stock Repurchase Program 2010 [Member]
Equity, Class of Treasury Stock [Line Items]
Maximum amount authorized to repurchase common stock by Board of Director	400.0
Amount used to repurchase common stock	$ 303.2
Purchase of common stock, shares	10.1
Average cost per share of common stock	$ 30.08

Prospective Common Stock Dividends Per Share.

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Stockholders' Equity and Earnings Per Share.

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Equity impact of common stock cash dividends declared by an entity during the period. This element includes paid and unpaid dividends declared during the period.

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-Publisher SEC
-Name Regulation S-X (SX)
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Carrying value as of the balance sheet date of dividends declared but unpaid on equity securities issued by the entity and outstanding. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

+ References

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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The cash outflow to reacquire common stock during the period.

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The amount authorized by an entity's Board of Directors under a stock repurchase plan.

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Total cost of shares repurchased divided by the total number of shares repurchased.

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Number of shares that have been repurchased during the period and are being held in treasury.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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