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Financial Instruments and Other Guarantees - Narratives (Details) - USD ($) $ in Millions |  |  | 3 Months Ended | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Jan. 18, 2024 | Feb. 03, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2024 | Sep. 30, 2023 | Dec. 31, 2023 | Apr. 14, 2023 | Mar. 31, 2023 | Feb. 13, 2023
Guarantee Obligations [Line Items] |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Current Borrowing Capacity |  |  |  |  |  |  |  | $ 237.2 |  |
Net loss on early debt extinguishment |  |  | $ 0.0 | $ 0.0 | $ 0.0 | $ 8.8 |  |  |  |
Interest expense, net of capitalized interest |  |  | 9.7 | 13.8 | 35.1 | 45.5 |  |  |  |
Restricted Cash |  |  | 705.6 |  | 705.6 |  | $ 680.9 |  |  |
Difference between penal sum of all surety bonds and amount of collateral posted in favor of surety providers |  |  | 507.3 |  | 507.3 |  |  |  |  |
Capitalized debt issuance costs related to bank guarantees |  |  |  |  | 1.4 |  |  |  |  |
Cash-backed bank guarantee facilities |  |  | 187.9 |  | 187.9 |  |  |  |  |
Letter of Credit |  |  |  |  |  |  |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |  |  |  |  |  |  |
Letters of credit outstanding, amount |  |  | 98.6 |  | 98.6 |  |  |  |  |
Proceeds from Issuance of Debt |  | $ 324.0 |  |  |  |  |  |  |  |
Line of Credit Facility, Increase (Decrease), Net |  | $ (65.0) |  |  |  |  |  |  |  |
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage |  | 6.00% |  |  |  |  |  |  |  |
Line of Credit Facility, Commitment Fee Percentage | 0.50% | 0.50% |  |  |  |  |  |  |  |
Collateralized Letter of Credit Agreement |  |  |  |  |  |  |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |  |  |  |  |  |  |
Letters of credit outstanding, amount |  |  | 116.6 |  | 116.6 |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  | $ 250.0 |  | $ 250.0 |  |  |  |  |
Cash Collateral, Percentage of the aggregate amount of letters of credit outstanding |  |  | 103.00% |  | 103.00% |  |  |  |  |
Cash-collateralized Letters of Credit |  |  | $ 120.1 |  | $ 120.1 |  |  |  |  |
Stated interest rate |  |  | 0.75% |  | 0.75% |  |  |  |  |
Surety Trust Account |  |  |  |  |  |  |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |  |  |  |  |  |  |
Restricted Cash |  |  | $ 397.6 |  | $ 397.6 |  | $ 444.0 |  | $ 566.3 |
Accounts Receivable Securitization Program |  |  |  |  |  |  |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |  |  |  |  |  |  |
Line of Credit Facility, Previous Maximum Borrowing Capacity |  |  |  |  |  |  |  |  |  | $ 175.0
Line of credit facility, maximum borrowing capacity |  |  |  |  |  |  |  |  |  | $ 225.0
Accounts Receivable Securitization Program | Secured debt |  |  |  |  |  |  |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |  |  |  |  |  |  |
Letters of credit outstanding, amount |  |  | 60.4 |  | $ 60.4 |  |  |  |  |
Basis spread on variable rate |  |  |  |  | 2.10% |  |  |  |  |
Maximum |  |  |  |  |  |  |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Collateral Amount |  |  |  |  |  |  |  | $ 721.8 |  |
Basis spread on variable rate | 3.25% |  |  |  |  |  |  |  |  |
Maximum | Letter of Credit |  |  |  |  |  |  |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 4.25% |  |  |  |  |  |  |  |  |
Maximum | Collateralized Letter of Credit Agreement |  |  |  |  |  |  |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |  |  |  |  |  |  |
Transaction support agreements, additional collateral demands |  |  | 5.0 |  | $ 5.0 |  |  |  |  |
Minimum |  |  |  |  |  |  |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 2.50% |  |  |  |  |  |  |  |  |
Minimum | Letter of Credit |  |  |  |  |  |  |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |  |  |  |  |  |  |
Basis spread on variable rate | 3.50% |  |  |  |  |  |  |  |  |
Surety Bond |  |  |  |  |  |  |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Transaction Support Agreements, Additional Collateral Posted |  |  |  |  |  |  |  |  | 140.5 |
Debt Instrument, Transaction Support Agreement, Additional Collateral Held |  |  |  |  |  |  |  |  | $ 15.0 |
Surety Agreement Liquidity Covenant, Amount |  |  | $ 400.0 |  | $ 400.0 |  |  |  |  |
Surety Bond | Maximum |  |  |  |  |  |  |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |  |  |  |  |  |  |
Net Leverage Ratio |  |  | 1.5 |  | 1.5 |  |  |  |  |
Surety Bond | Minimum |  |  |  |  |  |  |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |  |  |  |  |  |  |
Net Leverage Ratio |  |  | 1.0 |  | 1.0 |  |  |  |  |
Senior Notes | 3.250% Convertible Senior Notes due March 2028 (2028 Convertible Notes) |  |  |  |  |  |  |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |  |  |  |  |  |  |
Debt Instrument, Funded, Percent |  |  | 50.00% |  | 50.00% |  |  |  |  |
Stated interest rate |  |  | 3.25% |  | 3.25% |  |  |  |  |
Secured debt | Accounts Receivable Securitization Program |  |  |  |  |  |  |  |  |  |
Guarantee Obligations [Line Items] |  |  |  |  |  |  |  |  |  |
Outstanding borrowings |  |  | $ 0.0 |  | $ 0.0 |  |  |  |  |
Accounts Receivable from Securitization |  |  | 95.6 |  | 95.6 |  |  |  |  |
Interest expense, net of capitalized interest |  |  | $ 0.5 | $ 0.9 | $ 1.9 | $ 2.8 |  |  |  |

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