Assets Held For Sale - Assets and Liabilities (Detail) - Personal Care [Member] - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Patient accounts receivable	$ 9.6	$ 8.7
Prepaid expenses	0.1	0.1
Other current assets	9.7	8.8
Property and equipment	0.1	0.2
Disposal Group Including Discontinued Operation Operating Lease Right Of Use Assets Noncurrent	2.5	2.8
Goodwill	43.1	43.1
Intangible assets	0.0	1.8
Total assets	55.4	56.7
Accounts payable	0.4	0.3
Payroll and employee benefits	0.6	2.5
Accrued expenses	1.8	0.1
Current portion of operating lease liabilities	0.6	0.7
Total current liabilities	3.4	3.6
Operating lease liabilities, less current portion	1.9	2.2
Total liabilities	$ 5.3	$ 5.8