Employee Benefit Plans (Details Textuals) (USD $) In Millions, except Per Share data, unless otherwise specified	1 Months Ended	6 Months Ended
Feb. 28, 2011	Jun. 30, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares issued pursuant to stock awards, net, shares	6
Employee Benefit Plans (Textuals) [Abstract]
Weighted-average period over which the unearned stock-based compensation is expected		1.4
Stock option granted		Less than one million stock options were granted
Restricted Stock Units Incentive Program [Member]
Employee Benefit Plans (Textuals) [Abstract]
Restricted stock units granted based on 2010 performance targets		0.2
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units granted, weighted average grant-date fair value per share		$ 43.92
Employee Benefit Plans (Textuals) [Abstract]
Restricted stock units granted based on 2010 performance targets		9.0

Employee Benefit Plans Textuals.

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- Definition

Share Based Compensation Shares Authorized Under Stock Option Plans Exercise Price Range Number Of Options Granted In Period.

+ Details

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- Definition

The number of shares issuable under a share-based award plan pertaining to grants made during the period on other than stock option plans (for example, phantom stock plan, stock appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(2)(c)

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- Definition

The weighted average fair value at grant for nonvested share-based awards issued during the period on other than stock option plans (for example, phantom stock plan, stock appreciation rights plan, performance target plan).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph b(2)(c)

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph c(1)

+ Details

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- Definition

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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- Definition

The weighted-average period remaining as of the balance-sheet date until option expiration pertaining to the outstanding stock options for all option plans in the customized range of exercise prices, which may be expressed in a variety of ways (for example, years, months).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph A240
-Subparagraph d(1)

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- Definition

Number of stock granted during the period as a result of any share-based compensation plan other than en employee stock ownership plan

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 123R
-Paragraph 43

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