This element represents the overall income (loss) from a disposal group apportioned to the parent that is classified as a component of the entity, net of income tax, reported as a separate component of income before extraordinary items after deduction or consideration of the amount which may be allocable to noncontrolling interests, if any. Includes the following (net of tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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The cash inflow associated with the amount received from the sale of a business segment or subsidiary or sale of an entity that is related to it but not strictly controlled during the period (for example, an unconsolidated subsidiary, affiliate, joint venture or equity method investment).

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Discontinued Operations (Details) (USD $)	0 Months Ended	6 Months Ended		0 Months Ended	3 Months Ended	12 Months Ended
Discontinued Operations (Details) (USD $)	Mar. 04, 2011	Jun. 30, 2012	Jun. 30, 2011	Jun. 01, 2012 U.S.-based Insurance Operations, Held-for-sale [Member] Reserve Collar [Member]	Jun. 30, 2012 U.S.-based Insurance Operations, Held-for-sale [Member] Reserve Collar [Member]	Dec. 31, 2011 U.S.-based Insurance Operations, Held-for-sale [Member] Reserve Collar [Member]	Dec. 31, 2011 U.S.-based Insurance Operations, Held-for-sale [Member] Reserve Collar [Member] Potential Payables, Adverse Development on Net Claims and Claim Expenses, Prior Accident Years, Maximum [Member]	Dec. 31, 2011 U.S.-based Insurance Operations, Held-for-sale [Member] Reserve Collar [Member] Potential Receivables, Favorable Development on Net Claims and Claim Expenses, Prior Accident Years, Maximum [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net consideration	$ 269,500,000	$ 0	$ 269,520,000
Payable or reimbursement to QBE							10,000,000
Receivable or reimbursement from QBE								10,000,000
Expense recognized related to the reserve liability						10,000,000
Payment related to reserve collar				9,000,000
Gain on settlement of reserve collar					$ 1,000,000