Fair Value Measurements - Summary of Fair Value of Assets and Liabilities (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Sep. 27, 2019	Dec. 31, 2018
Level 1 | Demand and time deposits
Assets:
Cash and cash equivalents	$ 26.0	$ 21.2
Level 1 | Money market funds
Assets:
Cash and cash equivalents	0.4	0.2
Level 2 | Demand and time deposits
Assets:
Cash and cash equivalents	0.0	0.0
Level 2 | Money market funds
Assets:
Cash and cash equivalents	0.0	0.0
Level 3 | Demand and time deposits
Assets:
Cash and cash equivalents	0.0	0.0
Level 3 | Money market funds
Assets:
Cash and cash equivalents	0.0	0.0
Estimate of Fair Value | Demand and time deposits
Assets:
Cash and cash equivalents	26.0	21.2
Estimate of Fair Value | Money market funds
Assets:
Cash and cash equivalents	$ 0.4	$ 0.2