Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities
Net loss	$ (6.3)	$ (6.0)
Adjustments to reconcile net loss to net cash provided by operating activities
Depreciation and amortization	64.6	65.9
Change in fair value of derivative instruments	0.0	2.5
Amortization of debt issuance costs and original issue discount	1.5	1.3
Accretion on landfill retirement obligations	4.5	4.4
Other accretion and amortization	1.8	1.5
Provision for doubtful accounts	2.2	1.1
Loss on disposition of property and equipment	0.1	0.2
Stock based compensation	1.6	4.1
Deferred tax benefit	(1.3)	(1.6)
Earnings in equity investee	(0.5)	(0.8)
Changes in operating assets and liabilities, net of businesses acquired
Decrease in accounts receivable	13.4	5.9
Decrease (increase) in prepaid expenses and other current assets	1.1	(0.1)
Decrease in other assets	0.6	1.9
(Decrease) increase in accounts payable	(7.1)	2.9
Decrease in accrued expenses	(2.1)	(1.0)
Decrease in deferred revenue	(3.6)	(1.2)
Decrease in other long-term liabilities	(2.1)	(4.8)
Capping, closure and post-closure obligations	(3.7)	(3.7)
Net cash provided by operating activities	64.7	72.5
Cash flows from investing activities
Purchases of property and equipment and construction and development	(47.1)	(32.5)
Proceeds from sale of property and equipment and insurance recoveries	0.3	1.0
Acquisition of businesses, net of cash acquired	0.0	(26.1)
Net cash used in investing activities	(46.8)	(57.6)
Cash flows from financing activities
Proceeds from borrowings on debt instruments	65.0	58.0
Repayment on debt instruments, including finance leases	(70.8)	(74.0)
Proceeds from stock option exercises net of stock repurchases	6.4	1.9
Net cash provided by (used in) financing activities	0.6	(14.1)
Net increase in cash and cash equivalents	18.5	0.8
Cash and cash equivalents, beginning of period	12.5	6.8
Cash and cash equivalents, end of period	$ 31.0	$ 7.6