v3.24.0.1
Commitments and Contingencies (Tables)
 12 Months Ended
Dec. 31, 2023
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, 2023 are as follows:
2024$205.2 
2025159.4 
2026109.7 
202776.6 
202849.7 
Thereafter373.7 
$974.3 
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, 2023December 31, 2022December 31, 2021
Cash and cash equivalents$140.0 $143.4 $29.0 
Restricted cash and marketable securities163.6 127.6 139.0 
Less: restricted marketable securities(76.1)(56.7)(62.4)
Cash, cash equivalents, restricted cash and restricted cash equivalents$227.5 $214.3 $105.6 
Schedule of restricted cash and marketable securities
The following table summarizes our restricted cash and marketable securities as of December 31:
20232022
Capping, closure and post-closure obligations$43.2 $39.1 
Insurance120.4 88.5 
Total restricted cash and marketable securities$163.6 $127.6 
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:
20232022
Letters of credit$466.9 $475.0 
Surety bonds$4,677.1 $4,322.3