Leases Narrative (Details) - USD ($) $ in Millions	Oct. 01, 2019	Sep. 30, 2019	Jan. 01, 2019
Lessee, Lease, Description [Line Items]
Operating lease, right-of-use asset			$ 51.7
Operating lease liabilities		$ 66.3	55.6
Operating lease, current liability			12.5
Operating lease, noncurrent liability			$ 43.1
Progress payments made on behalf of company, paid		$ 1.7
Progress payments made on behalf of company, scheduled to be paid	$ 9.5
Forecast
Lessee, Lease, Description [Line Items]
Finance lease not yet commenced, right-of-use asset to be recognized	11.2
Finance lease not yet commenced, liability to be recognized	$ 11.2