Retirement Benefit Arrangements (Details - Other Details) ([ForeignPensionPlansDefinedBenefitMember], USD $)	12 Months Ended
Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Defined Benefit Plan Plan Assets [Line Items]
Fair value of plan assets	$ 95,994,000	$ 97,195,000
Defined Benefit Plan Other Details [Abstract]
Net amounts recognized in accumulated other comprehensive income	19,100,000	15,200,000
Tax on amounts recognized in accumulated other comprehensive income	5,100,000	4,100,000
Net periodic benefit cost	10,000,000	6,100,000	6,000,000
Estimated contributions for next fiscal year	5,700,000
[FairValueInputsLevel1Member] \| [EquityFundsMember]
Defined Benefit Plan Plan Assets [Line Items]
Fair value of plan assets	0	4,300,000
[FairValueInputsLevel1Member] \| [InsuredFundsMember]
Defined Benefit Plan Plan Assets [Line Items]
Fair value of plan assets	$ 96,000,000	$ 92,900,000

The aggregate net gain (loss) recognized in other comprehensive income, including amounts arising during the period and reclassification adjustments of other comprehensive income as a result of being recognized as components of net periodic benefit cost for the period.

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Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

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