XML 40 R30.htm IDEA: XBRL DOCUMENT

Organization and Summary of Accounting Policies - CARES ACT (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended	18 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Dec. 31, 2020	Sep. 30, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Proceeds from grants received	$ 0.0		$ 8.0			$ 67.0
Grant funds	0.0	$ (9.9)	20.0	$ 33.2
Accelerated payments					$ 120.0
Repayments of grants received	18.0		38.0
Deferred accelerated payments	80.0		80.0		95.0	80.0
Deferred accrued payroll and benefits	$ 16.9		$ 16.9		$ 16.9	$ 16.9