Income Taxes - Narrative (Details) $ in Millions	9 Months Ended	12 Months Ended
	Dec. 31, 2020 USD ($)	Oct. 31, 2021 USD ($) state	Oct. 31, 2020 USD ($)	Oct. 31, 2019 USD ($)
Income Taxes [Line Items]
Effective tax rate		29.80%	99.60%	20.40%
Income tax provision		$ 53.5	$ 53.1	$ 32.7
Income tax expense related to nonreductive transaction costs		3.0
Income tax provision (benefit) related to change in tax reserves		2.6	(1.1)
State true-ups		1.4	(5.7)
Income tax benefit related to deduction for energy efficiency		1.2	2.1
Work opportunity tax credit, adjustment			2.3
Nondeductible impairment loss			$ 163.8
Effective tax rate , excluding nondeductible impairment loss			24.40%
Social security tax, employer, deferral, CARES Act	$ 132.0
Tax credits		3.4
Unrecognized tax benefits that would impact effective tax rate		30.4	$ 35.5	35.3
Maximum decrease in unrecognized tax benefits that is reasonably possible		8.3
Uncertain tax positions, interest and penalties accrued		1.6	1.5
Unrecognized tax benefits, interest and penalties expense		$ 0.1	$ 0.4
Unrecognized tax benefits, interest and penalties benefit				$ 0.2
Number of states in which entity operates | state		50
State and Local Jurisdiction
Income Taxes [Line Items]
Operating loss carryforwards		$ 74.2