Income Taxes (Details 1)	12 Months Ended
Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008
Reconciliation of the applicable statutory U.S. income tax rate to the effective tax rate
Increase/(decrease) in tax rate resulting from U.S. state and local income taxes, net of U.S. federal income tax benefit	3.60%	2.70%	16.00%
Increase/(decrease) in tax rate resulting from tax-exempt income	(2.40%)	(3.90%)	(14.80%)
Increase/(decrease) in tax rate resulting from Non-U.S. subsidiary earnings	(2.20%)	(1.70%)	(53.60%)
Increase/(decrease) in tax rate resulting from business tax credits	(3.70%)	(5.50%)	(24.50%)
Bear Stearns equity losses	0		0.057
Other, net	(0.20%)	0.90%	2.80%
Effective tax rate	30.10%	27.50%	(33.40%)
Internal Revenue Service (IRS) [Member]
Reconciliation of the applicable statutory U.S. income tax rate to the effective tax rate
Statutory U.S. federal tax rate	35.00%	35.00%	35.00%

The portion of the difference between the effective income tax rate and the domestic federal statutory income tax rate attributable to the equity in earnings (losses) of an acquiree following a step acquisition in a business combination that the acquiror cannot include (deduct) in determining income tax expense under enacted tax laws.

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- Definition

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 109

-Paragraph 47

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 08

-Paragraph h

-Subparagraph 2

-Article 4

+ Details

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- Definition

The domestic federal statutory tax rate applicable under enacted tax laws to the Company's pretax income from continuing operations for the period. The "statutory" tax rate shall be the regular tax rate if there are alternative tax systems.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 109

-Paragraph 47

+ Details

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- Definition

The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the difference between statutory income tax rates in foreign jurisdictions and the domestic federal statutory income tax rate recorded during the period.

+ Details

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- Definition

The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to all other items not otherwise listed in the existing taxonomy.

+ Details

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- Definition

The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by the state and local income tax expense (benefit), net of the federal tax benefit (expense) thereon, recorded during the period.

+ Details

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- Definition

The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate that can be explained by tax credits, not otherwise listed in the existing taxonomy, generated or utilized under enacted tax laws during the period.

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- Definition

The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to income that is exempt from income taxes under enacted tax laws.

+ Details

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