Income Taxes Other Capital Loss Carryforward (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012
Other Tax Carryforward [Line Items]
Other Tax Carryforward, Gross Amount	$ 112.2
Expires after one year before year two [Member]
Other Tax Carryforward [Line Items]
Other Tax Carryforward, Gross Amount	106.2
Expires after year two before year three [Member]
Other Tax Carryforward [Line Items]
Other Tax Carryforward, Gross Amount	0.1
Expires after year three before year four [Member]
Other Tax Carryforward [Line Items]
Other Tax Carryforward, Gross Amount	$ 5.9