For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Revenue Recognition - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
NEMT
Deferred Revenue
Performance obligation satisfied in previous period	$ 0.1	$ (3.6)	$ 0.2	$ (3.5)
NEMT \| One US State \| Revenue Benchmark \| Government Contracts Concentration Risk \| Continuing operations
Deferred Revenue
Concentration risk, percentage			9.70%	10.40%
Personal Care \| One US State \| Revenue Benchmark \| Government Contracts Concentration Risk \| Continuing operations
Deferred Revenue
Concentration risk, percentage			28.10%