Income Taxes (Details 1)	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Effective tax rate reconciliation
Combined tax at U.S. statutory federal income tax rate	35.00%	35.00%	35.00%
Increase (Decrease) in taxes resulting from:
Tax-exempt income	(1.50%)	(1.90%)	(4.60%)
State and local income taxes, net of federal benefit	2.60%	2.70%	2.70%
Non-U.S. subsidiaries earnings	(4.40%)	(3.10%)	(6.80%)
Tax settlements	(1.90%)	(1.30%)	(1.40%)
All other	(0.20%)	0.60%	(0.10%)
Actual tax rates	29.60%	32.00%	24.80%

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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.

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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 is the regular tax rate if there are alternative tax systems.

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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.

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The portion of the difference between the effective income tax rate and domestic federal statutory income tax rate attributable to the repatriation of foreign earnings under enacted tax laws.

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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 or benefit, net of the federal tax benefit (expense) thereon, recorded during the period.

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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.

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The sum of the differences between the effective income tax rate and domestic federal statutory income tax rate attributable to all income tax settlements during the period.

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