Landfill and Environmental Costs (Details 1) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Activity in asset retirement obligation liabilities, which includes liabilities for final capping, closure and post-closure
Landfill final capping, closure and post-closure liabilities, , beginning of year			$ 1,091.3	$ 1,052.4
Non-cash additions			29.1	27.2
Acquisitions/divestitures and other adjustments			3.7	(0.6)
Asset retirement obligation adjustments			(17.7)	(1.5)
Payments			(36.5)	(59.0)
Accretion expense	19.5	19.2	58.4	57.6
Landfill final capping, closure and post-closure liabilities, end of period	1,128.3	1,076.1	1,128.3	1,076.1
Less: current portion	(90.1)	(104.5)	(90.1)	(104.5)
Long-term portion	$ 1,038.2	$ 971.6	$ 1,038.2	$ 971.6