Goodwill and Other Intangible Assets, Net (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Goodwill and Intangible Assets [Line Items]
Other intangibles impairment charge	$ 0.0	$ (3.1)	$ (8.2)
Goodwill impairment loss		0.0	(1.3)
Home Health [Member]
Goodwill and Intangible Assets [Line Items]
Goodwill impairment loss		0.0	(1.3)
Hospice [Member]
Goodwill and Intangible Assets [Line Items]
Goodwill impairment loss		0.0	0.0
Equity Method Investments [Member]
Goodwill and Intangible Assets [Line Items]
Goodwill impairment loss			1.3
Care Centers Closed Or Consolidated [Member]
Goodwill and Intangible Assets [Line Items]
Other intangibles impairment charge		2.2	3.6
Annual Impairment Test Step One [Member]
Goodwill and Intangible Assets [Line Items]
Other intangibles impairment charge		$ 0.9	$ 4.6