XML 108 R90.htm IDEA: XBRL DOCUMENT v3.8.0.1
Income Taxes - Income/(Loss) Before Tax and Income Tax Expense/(Benefit) Attributable to that Income (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Tax Examination [Line Items]                              
(Loss)/income before tax, Non-U.S.                         $ (26.8) $ (23.5) $ 6.4
(Loss)/income before tax, U.S.                         (140.3) (70.2) (32.7)
(Loss)/income from operations before income tax $ (195.1) $ (263.0) $ 77.0 $ 99.3 $ (74.1) $ 100.5 $ 66.2 $ 116.9 $ 123.2 $ 30.0 $ 51.2 $ 133.1 (281.8) 209.5 337.5
Current income tax (benefit)/expense, Non-U.S.                         2.1 1.1 4.8
Current income tax (benefit)/expense, U.S.                         0.0 0.0 1.6
Current income tax (benefit)/expense, Total                         17.1 (2.1) 23.3
Deferred income Tax (benefit), Non-U.S.                         (0.3) 0.3 (0.6)
Deferred income Tax (benefit), U.S.                         1.1 2.5 (4.1)
Deferred Income Tax, Total                         (32.5) 8.2 (8.9)
Total income tax expense/(benefit), Non-U.S.                         1.8 1.4 4.2
Total income tax expense/(benefit), U.S.                         1.1 2.5 (2.5)
Total income tax expense/(benefit) $ (10.2) $ (9.2) $ 1.2 $ 2.8 $ (2.6) $ 4.9 $ 1.3 $ 2.5 $ 5.3 $ 1.8 $ 2.2 $ 5.1 (15.4) 6.1 14.4
Bermuda                              
Income Tax Examination [Line Items]                              
(Loss)/income before tax, Non-U.S.                         (130.0) 259.5 283.9
Current income tax (benefit)/expense, Non-U.S.                         0.9 0.0 1.4
Deferred income Tax (benefit), Non-U.S.                         0.0 0.0 0.0
Total income tax expense/(benefit), Non-U.S.                         0.9 0.0 1.4
U.K.                              
Income Tax Examination [Line Items]                              
(Loss)/income before tax, Non-U.S.                         15.3 43.7 79.9
Current income tax (benefit)/expense, Non-U.S.                         14.1 (3.2) 15.5
Deferred income Tax (benefit), Non-U.S.                         (33.3) 5.4 (4.2)
Total income tax expense/(benefit), Non-U.S.                         $ (19.2) $ 2.2 $ 11.3