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PROVISIONS
 12 Months Ended
Dec. 31, 2021
Other Provisions, Contingent Liabilities And Contingent Assets [Abstract]  
PROVISIONS PROVISIONS
The following table presents the change in the decommissioning liabilities for Brookfield Renewable:
(MILLIONS)20212020
Balance, beginning of the year$645 $504 
Acquisitions through business combinations
99 23 
Disposal (12)— 
Accretion
13 17 
Changes in estimates(69)94 
Foreign exchange(8)7 
Balance, end of the year$668 $645 
Brookfield Renewable has recorded decommissioning retirement obligations associated with certain power generating assets. The decommissioning retirement obligation has been established for hydroelectric, wind and solar operation sites that are substantially expected to be restored between the years 2031 to 2055. The estimated cost of decommissioning activities is based on a third-party assessment.
For details on other legal provisions, please refer to Note 28 – Commitments, contingencies and guarantees.