v3.10.0.1

Changes in Accumulated Other Comprehensive Income by Component - Summary of Reclassifications Out of AOCI (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Reclassifications out of Accumulated Other Comprehensive Income [Line Items]
Revenue	$ 2,517.8	$ 2,526.7	$ 4,945.2	$ 4,919.5
Cost of operations	(1,577.2)	(1,557.4)	(3,047.0)	(3,041.5)
Interest expense	(96.5)	(89.5)	(191.3)	(179.0)
Income before income taxes	312.6	333.4	623.3	629.7
Tax (expense) benefit	(76.9)	(130.0)	(149.7)	(238.5)
Total gains (losses) reclassified, net of tax	0.8	(1.7)	1.0	(3.1)
Gains (Losses) on Cash Flow Hedges
Reclassifications out of Accumulated Other Comprehensive Income [Line Items]
Total gains (losses) reclassified, net of tax			1.0
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | Gains (Losses) on Cash Flow Hedges
Reclassifications out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes	1.1	(2.9)	1.4	(5.2)
Tax (expense) benefit	(0.3)	1.2	(0.4)	2.1
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | Gains (Losses) on Cash Flow Hedges | Recyclable commodity hedges
Reclassifications out of Accumulated Other Comprehensive Income [Line Items]
Revenue	0.3	(1.0)	0.3	(1.7)
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | Gains (Losses) on Cash Flow Hedges | Fuel Hedges
Reclassifications out of Accumulated Other Comprehensive Income [Line Items]
Cost of operations	1.1	(1.2)	1.9	(2.2)
Amount Reclassified from Accumulated Other Comprehensive Income (Loss) | Gains (Losses) on Cash Flow Hedges | Terminated interest rate locks
Reclassifications out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ (0.3)	$ (0.7)	$ (0.8)	$ (1.3)

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