Self-Insured Risks - Table 1 (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Insurance Reserves [Line Items]
Self-Insurance Reserves, Balance at Beginning of Period, Gross		$ 134.3	$ 140.3	$ 148.3
Reinsurance Receivables		(26.0)	(32.6)	(29.4)
Self-Insurance Reserves, Balance at Beginning of Period, Net		108.3	107.7	118.9
Self-Insurance Reserves, Balance at End of Period, Net	$ 107.7	115.5	108.3	107.7
Reinsurance Receivables	32.6	26.6	26.0	32.6
Self-Insurance Reserves, Balance at End of Period, Gross	140.3	142.1	134.3	140.3
Provision, Current Year Claims [Member]
Insurance Reserves [Line Items]
Increase (Decrease) in Self-Insurance Reserve		37.1	34.7	34.4
Provision, Prior Year Claims [Member]
Insurance Reserves [Line Items]
Increase (Decrease) in Self-Insurance Reserve		(4.6)	(3.5)	(5.9)
Statistical Confidence Level [Member]
Insurance Reserves [Line Items]
Increase (Decrease) in Self-Insurance Reserve	$ (6.7)	0.0	0.0	(6.7)
Discontinued Operations, Insurance Reserve [Member]
Insurance Reserves [Line Items]
Increase (Decrease) in Self-Insurance Reserve		(0.5)	(0.3)	(1.8)
Payments, Current Year Claims [Member]
Insurance Reserves [Line Items]
Increase (Decrease) in Self-Insurance Reserve		(4.7)	(4.4)	(3.9)
Payments, Prior Year Claims [Member]
Insurance Reserves [Line Items]
Increase (Decrease) in Self-Insurance Reserve		(22.5)	(25.9)	(27.3)
Acquisitions [Member]
Insurance Reserves [Line Items]
Increase (Decrease) in Self-Insurance Reserve		$ 2.4	$ 0.0	$ 0.0