Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2021

Commitments and Contingencies Disclosure [Abstract]

Schedule of future minimum payments under unconditional purchase commitments

Future minimum payments under unconditional purchase commitments, consisting primarily of (1) disposal related agreements, which include fixed or minimum royalty payments, host agreements, and take-or-pay and put-or-pay agreements, and (2) other obligations including committed capital expenditures and consulting service agreements as of December 31, 2021 are as follows:

2022	$	142.6
2023	107.3
2024	81.8
2025	58.1
2026	34.8
Thereafter	347.7
	$	772.3

Schedule of cash, cash equivalents, restricted cash and restricted cash equivalents

Beginning-of-period and end-of-period cash, cash equivalents, restricted cash and restricted cash equivalents as presented in the statements of cash flows are reconciled as follows:

	December 31, 2021		December 31, 2020		December 31, 2019
Cash and cash equivalents	$	29.0	$	38.2	$	47.1
Restricted cash and marketable securities	139.0		149.1		179.4
Less: restricted marketable securities	(62.4)		(73.1)		(49.1)
Cash, cash equivalents, restricted cash and restricted cash equivalents	$	105.6	$	114.2	$	177.4

Our restricted cash and marketable securities include, among other things, restricted cash related to proceeds from the issuance of tax-exempt bonds that will be used to fund qualifying landfill-related expenditures in the Commonwealth of Pennsylvania, restricted cash and marketable securities pledged to regulatory agencies and governmental entities as financial guarantees of our performance under certain collection, landfill and transfer station contracts and permits, and relating to our final capping, closure and post-closure obligations at our landfills, and restricted cash and marketable securities related to our insurance obligations.

Schedule of restricted cash and marketable securities

The following table summarizes our restricted cash and marketable securities as of December 31:

	2021		2020
Financing proceeds	$	12.4	$	—
Capping, closure and post-closure obligations	42.4		31.5
Insurance	84.2		117.6
Total restricted cash and marketable securities	$	139.0	$	149.1

Schedule of financial instruments and collateral in place

We had the following financial instruments and collateral in place to secure our financial assurances as of December 31:

	2021		2020
Letters of credit	$	465.5	$	474.2
Surety bonds	$	3,950.2	$	3,580.7