Balance Sheet Accounts and Supplemental Disclosures - Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 161.6	$ 161.6
Accumulated Amortization	126.7	116.8
Net Carrying Amount	34.9	44.8
Amortization expense	9.9	13.4	$ 13.6
Customer related
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	87.2	87.2
Accumulated Amortization	81.3	75.3
Net Carrying Amount	5.9	11.9
Intellectual property\trade secrets
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	34.2	34.2
Accumulated Amortization	22.3	19.7
Net Carrying Amount	11.9	14.5
Trade name
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	21.0	21.0
Accumulated Amortization	6.1	5.4
Net Carrying Amount	14.9	15.6
Acquired technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	19.2	19.2
Accumulated Amortization	17.0	16.4
Net Carrying Amount	$ 2.2	$ 2.8