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INCOME TAXES - RATE RECONCILIATION (Details) - CAD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
INCOME TAX RATE RECONCILIATION |  |  |
Earnings before income taxes | $ 4,190 | $ 7,535 | $ 3,570
Canadian federal statutory income tax rate | 15.00% | 15.00% | 15.00%
Expected federal taxes at statutory rate | $ 629 | $ 1,130 | $ 536
Increase/(decrease) resulting from: |  |  |
Provincial and state income taxes | 288 | 415 | (24)
Foreign and other statutory rate differentials | (53) | 129 | 94
Impact of US tax reform | 0 | 0 | (2)
Effects of rate-regulated accounting | (145) | (63) | (163)
Foreign allowable interest deductions | (4) | (29) | (134)
Part VI.1 tax, net of federal Part I deduction | 76 | 78 | 76
Impairment of goodwill | 0 | 0 | 192
US BEAT | 44 | 67 | 43
Non-taxable portion of gain on sale of investment to unrelated party | 0 | 0 | 31
Valuation allowance | (6) | 26 | (172)
Intercorporate investments | 0 | (14) | (149)
Noncontrolling interests | (8) | (13) | (47)
Other | (47) | (18) | (44)
Income tax expense | $ 774 | $ 1,708 | $ 237
Effective income tax rate (as a percent) | 18.50% | 22.70% | 6.60%

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