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PROVISIONS (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
Provisions reconciliation |  |
Provisions at beginning of period | $ 897.0 |
Additions | 65.9 |
Reductions | (36.9) |
Reclamation spending | (58.1) |
Accretion | 29.1 |
Reclamation recovery | (8.0) |
Provisions at end of period | 889.0 | $ 897.0
Current portion | 72.6 |
Non-current portion | 816.4 |
Reclamation and remediation obligations |  |
Provisions reconciliation |  |
Provisions at beginning of period | 861.4 |
Additions | 53.7 |
Reductions | (24.0) |
Reclamation spending | (58.1) |
Accretion | 29.1 |
Reclamation recovery | (8.0) |
Provisions at end of period | 854.1 | 861.4
Current portion | 63.6 |
Non-current portion | 790.5 |
Expense due to change in fair value | 8.0 | 11.4
Letter of credit issued to various agencies | 366.7 | 411.5
Surety bonds | $ 264.4 | $ 254.7
Reclamation and remediation obligations | Minimum |  |
Provisions reconciliation |  |
Discount rate used in estimating site restoration cost obligation (in percent) | 2.50% | 1.80%
Inflation rate used in estimating the site restoration cost obligation (in percent) | 2.10% | 1.80%
Reclamation and remediation obligations | Maximum |  |
Provisions reconciliation |  |
Discount rate used in estimating site restoration cost obligation (in percent) | 12.30% | 11.60%
Inflation rate used in estimating the site restoration cost obligation (in percent) | 5.10% | 5.00%
Other |  |
Provisions reconciliation |  |
Provisions at beginning of period | $ 35.6 |
Additions | 12.2 |
Reductions | (12.9) |
Provisions at end of period | 34.9 | $ 35.6
Current portion | 9.0 |
Non-current portion | $ 25.9 |

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