Segment Reporting - Revenue by Service Line (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Collection:
Total collection	$ 1,784.1	$ 1,755.0	$ 3,521.4	$ 3,445.5
Total collection (in percentage)	75.90%	75.90%	76.60%	76.80%
Transfer	$ 296.8	$ 291.3	$ 565.0	$ 542.5
Less: intercompany	(178.2)	(177.5)	(342.7)	(335.3)
Transfer, net	$ 118.6	$ 113.8	$ 222.3	$ 207.2
Transfer, net (in percentage)	5.00%	4.90%	4.80%	4.60%
Landfill	$ 536.2	$ 531.3	$ 1,025.6	$ 987.4
Less: intercompany	(249.6)	(250.3)	(477.3)	(467.8)
Landfill, net	$ 286.6	$ 281.0	$ 548.3	$ 519.6
Landfill, net (in percentage)	12.20%	12.20%	11.90%	11.60%
Energy services	$ 17.2	$ 27.1	$ 35.8	$ 51.2
Energy services (in percentage)	0.70%	1.20%	0.80%	1.20%
Other:
Sale of recycled commodities	$ 101.4	$ 92.9	$ 188.2	$ 178.3
Sale of recyclable commodities (in percentage)	4.30%	4.00%	4.10%	4.00%
Other non-core	$ 42.8	$ 41.6	$ 83.2	$ 79.0
Other non-core (in percentage)	1.90%	1.80%	1.80%	1.80%
Total other	$ 144.2	$ 134.5	$ 271.4	$ 257.3
Total other (in percentage)	6.20%	5.80%	5.90%	5.80%
Total revenue	$ 2,350.7	$ 2,311.4	$ 4,599.2	$ 4,480.8
Total revenue (in percentage)	100.00%	100.00%	100.00%	100.00%
Residential
Collection:
Total collection	$ 559.8	$ 565.8	$ 1,110.8	$ 1,117.5
Total collection (in percentage)	23.80%	24.50%	24.20%	24.90%
Small-container commercial
Collection:
Total collection	$ 714.9	$ 699.1	$ 1,422.7	$ 1,393.9
Total collection (in percentage)	30.40%	30.20%	30.90%	31.10%
Large-container industrial
Collection:
Total collection	$ 499.7	$ 480.2	$ 968.9	$ 914.9
Total collection (in percentage)	21.30%	20.80%	21.10%	20.40%
Other
Collection:
Total collection	$ 9.7	$ 9.9	$ 19.0	$ 19.2
Total collection (in percentage)	0.40%	0.40%	0.40%	0.40%