Income Taxes - Summary of Operating Loss Carryforwards (Details) $ in Millions	Dec. 31, 2015 USD ($)
Operating Loss Carryforwards [Line Items]
U.S. federal and non-U.S. NOLs	$ 70.9
State taxing jurisdiction NOLs	2.3
U.S. federal, non-U.S., and state tax credit carryforwards	0.1
U.S. federal capital loss carryforwards	5.1
Total	78.4
2016 through 2025
Operating Loss Carryforwards [Line Items]
U.S. federal and non-U.S. NOLs	0.0
State taxing jurisdiction NOLs	1.6
U.S. federal, non-U.S., and state tax credit carryforwards	0.0
U.S. federal capital loss carryforwards	5.1
Total	6.7
2026 Through 2035
Operating Loss Carryforwards [Line Items]
U.S. federal and non-U.S. NOLs	70.9
State taxing jurisdiction NOLs	0.7
U.S. federal, non-U.S., and state tax credit carryforwards	0.1
U.S. federal capital loss carryforwards	0.0
Total	71.7
Indefinite
Operating Loss Carryforwards [Line Items]
U.S. federal and non-U.S. NOLs	0.0
State taxing jurisdiction NOLs	0.0
U.S. federal, non-U.S., and state tax credit carryforwards	0.0
U.S. federal capital loss carryforwards	0.0
Total	$ 0.0