Acquisitions and Divestitures - Schedule of Allocation of Purchase Price to Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015	Oct. 14, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Goodwill	$ 3.8	$ 3.8		$ 28.1
Connected Data, Inc.
Business Acquisition [Line Items]
Cash			$ 0.2
Inventory			0.2
Prepaid and other			0.1
Intangible assets, net			4.3
Goodwill			3.8
Accounts payable			(0.7)
Accrued expenses			(1.1)
Deferred revenue - current			(0.1)
Total purchase price			$ 6.7