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GUARANTEES AND CONTINGENCIES - Additional Information (Details) - Canada Revenue Agency (CRA) $ in Millions | 3 Months Ended
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Sep. 30, 2021 USD ($)
Loss Contingencies [Line Items] |
Estimated amount of loss resulting from an adverse tax position | $ 72
Income taxes paid | $ 28
Tax Year 2012 |
Loss Contingencies [Line Items] |
Additional tax expense, as a percent | 10.00%
Tax Year 2013 |
Loss Contingencies [Line Items] |
Additional tax expense, as a percent | 10.00%
Tax Year 2014 |
Loss Contingencies [Line Items] |
Additional tax expense, as a percent | 10.00%
Tax Year 2015 |
Loss Contingencies [Line Items] |
Additional tax expense, as a percent | 10.00%
Tax Year 2016 |
Loss Contingencies [Line Items] |
Additional tax expense, as a percent | 10.00%
Tax Year 2017 |
Loss Contingencies [Line Items] |
Estimated amount of loss resulting from an adverse tax position | $ 470
Minimum | Tax Year 2012 |
Loss Contingencies [Line Items] |
Income tax examination, estimate of increase to taxable income | 90
Minimum | Tax Year 2013 |
Loss Contingencies [Line Items] |
Income tax examination, estimate of increase to taxable income | 90
Minimum | Tax Year 2014 |
Loss Contingencies [Line Items] |
Income tax examination, estimate of increase to taxable income | 90
Minimum | Tax Year 2015 |
Loss Contingencies [Line Items] |
Income tax examination, estimate of increase to taxable income | 90
Minimum | Tax Year 2016 |
Loss Contingencies [Line Items] |
Income tax examination, estimate of increase to taxable income | 90
Maximum | Tax Year 2012 |
Loss Contingencies [Line Items] |
Income tax examination, estimate of increase to taxable income | 100
Maximum | Tax Year 2013 |
Loss Contingencies [Line Items] |
Income tax examination, estimate of increase to taxable income | 100
Maximum | Tax Year 2014 |
Loss Contingencies [Line Items] |
Income tax examination, estimate of increase to taxable income | 100
Maximum | Tax Year 2015 |
Loss Contingencies [Line Items] |
Income tax examination, estimate of increase to taxable income | 100
Maximum | Tax Year 2016 |
Loss Contingencies [Line Items] |
Income tax examination, estimate of increase to taxable income | $ 100

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