Fair Value Measurement - Assets and Liabilities Measured on Recurring Basis (Details) - Recurring basis - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Level 1
Assets
Assets, fair value	$ 0.0	$ 0.0
Level 1 | Prepaid expenses and other | Interest rate swap
Assets
Assets, fair value	0.0	0.0
Level 1 | Prepaid expenses and other | Contingent consideration receivable
Assets
Assets, fair value	0.0	0.0
Level 2
Assets
Assets, fair value	0.1	0.1
Level 2 | Prepaid expenses and other | Interest rate swap
Assets
Assets, fair value	0.1	0.1
Level 2 | Prepaid expenses and other | Contingent consideration receivable
Assets
Assets, fair value	0.0	0.0
Level 3
Assets
Assets, fair value	0.5	0.5
Level 3 | Contingent consideration receivable
Assets
Assets, fair value	0.5
Level 3 | Prepaid expenses and other | Interest rate swap
Assets
Assets, fair value	0.0	0.0
Level 3 | Prepaid expenses and other | Contingent consideration receivable
Assets
Assets, fair value	$ 0.5	$ 0.5