Slicers (applies to each fact value in each table cell)

Reporting Entity [Axis]

0001163348 (http://www.sec.gov/CIK)

Income Tax Disclosure [Abstract]	Period [Axis]
	2016-01-01 - 2016-12-31
Income Tax Disclosure [Abstract]
Schedule of components of income tax expense	The components of income tax expense are as follows:   Year Ended December 31,   2016 2015 2014 Current income tax expense $ 5.1   $ 9.8   $ 26.8 Deferred income tax (benefit) expense (14.2 )   (4.0 )   3.7 Income tax (benefit) expense $ (9.1 ) $ 5.8 $ 30.5
Schedule of sources of income before income tax	Our income or loss is primarily sourced from our Bermuda, U.S., European, including Switzerland, and Asia Pacific operations. The income (loss) before income taxes for these operations are as follows:   Year Ended December 31,   2016 2015 2014 Switzerland $ (25.5 )   $ (15.7 )   $ (19.0 ) Bermuda 336.6   162.1   460.2 United States (27.5 )   12.8   72.9 All other jurisdictions (37.4 )   (69.5 )   6.7 Income before income taxes $ 246.2 $ 89.7 $ 520.8
Schedule of significant components of net deferred tax assets	The significant components of the net deferred tax assets are as follows:   December 31,   2016 2015 Deferred tax assets: Reserve for losses and loss expenses $ 17.7 $ 22.2 Equity compensation 16.0 14.2 Unearned premium 17.1 18.1 Deferred acquisition costs 11.9 10.5 Mark-to-market losses 8.6 — Net loss carryforward 21.0   27.3 Total deferred tax assets 92.3 92.3 Deferred tax liabilities: Intangible assets (21.9 ) (23.3 ) Mark-to-market gains — (3.0 ) Depreciation (4.4 ) (6.4 ) Market discount on bonds (2.0 ) (1.2 ) Other (1.2 ) (5.2 ) Total deferred tax liabilities (29.5 ) (39.1 ) Net deferred taxes before valuation allowance 62.8   53.2 Valuation allowance (24.1 )   (28.8 ) Net deferred tax assets $ 38.7 $ 24.4
Schedule of current taxes receivable or payable	Current taxes receivable or payable was as follows:   December 31,   2016 2015 Current tax receivable $ 5.5   $ 5.5 Current tax payable $ 0.7   $ 2.5
Schedule of reconciliation between effective and expected tax rate	The reconciliation between the Company’s effective tax rate on pre-tax accounting income and the expected tax rate is as follows:   Year Ended December 31,   2016 2015 2014 Expected tax rate 7.8  %   7.8  %   7.8  % Income not subject to income tax (10.7 )%   (14.2 )%   (7.1 )% Valuation allowance 4.4  %   14.5  %   2.3  % Foreign taxes at local expected tax rates (4.6 )%   (1.7 )%   4.4  % Disallowed expenses and capital allowances 0.4  %   3.2  %   0.2  % Prior year refunds and adjustments (0.3 )%   —  %   1.2  % Other (0.7 )%   (3.2 )%   (2.9 )% Effective tax rate (3.7 )% 6.4  % 5.9  %