Basis of Presentation Recently Adopted Accounting Standards (Details) - USD ($) $ in Millions	Jan. 01, 2016	Dec. 31, 2015
Other Noncurrent Assets
New Accounting Pronouncement, Early Adoption [Line Items]
Long-term deferred tax assets	$ 10.8	$ 6.7
Deferred Income Tax and Other Long-term Liabilities
New Accounting Pronouncement, Early Adoption [Line Items]
Long-term deferred tax liabilities	4.4	$ 16.5
New Accounting Pronouncement, Early Adoption, Effect
New Accounting Pronouncement, Early Adoption [Line Items]
Decrease in current deferred tax assets	4.1
Decrease in deferred tax liabilities	$ 12.1