v3.19.2

income taxes | 6 Months Ended
--- | ---
Jun. 30, 2019
income taxes |
income taxes | 10 income taxes
|  | Three months |  | Six months
Periods ended June 30 (millions) |  | 2019 |  | 2018 |  | 2019 |  | 2018
Current income tax expense |  |  |  |  |  |  |  |  |  |  |  |
For the current reporting period |  | $ | 71 |  | $ | 139 |  | $ | 197 |  | $ | 283
Adjustments recognized in the current period for income taxes of prior periods |  |  | (1) |  |  | (8) |  |  | (1) |  |  | (8)
|  |  | 70 |  |  | 131 |  |  | 196 |  |  | 275
Deferred income tax expense |  |  |  |  |  |  |  |  |  |  |  |
Arising from the origination and reversal of temporary differences |  |  | 83 |  |  | 6 |  |  | 114 |  |  | 13
Revaluation of deferred income tax liability to reflect future income tax rates |  |  | (121) |  |  | — |  |  | (121) |  |  | —
Adjustments recognized in the current period for income taxes of prior periods |  |  | (1) |  |  | 8 |  |  | (1) |  |  | 8
|  |  | (39) |  |  | 14 |  |  | (8) |  |  | 21
|  | $ | 31 |  | $ | 145 |  | $ | 188 |  | $ | 296
Our income tax expense and effective income tax rate differ from those calculated by applying the applicable statutory rates for the following reasons:
Three-month periods ended June 30 ($ in millions) |  | 2019 |  | 2018 |
Income taxes computed at applicable statutory rates |  | $ | 147 |  | 26.7 | % | $ | 147 |  | 27.2 | %
Revaluation of deferred income tax liability to reflect future income tax rates |  |  | (121) |  | (22.0) |  |  | — |  | — |
Adjustments recognized in the current period for income taxes of prior periods |  |  | (2) |  | (0.3) |  |  | — |  | — |
Other |  |  | 7 |  | 1.2 |  |  | (2) |  | (0.5) |
Income tax expense per Consolidated statements of income and other comprehensive income |  | $ | 31 |  | 5.6 | % | $ | 145 |  | 26.7 | %
Six-month periods ended June 30 ($ in millions) |  | 2019 |  | 2018 |
Income taxes computed at applicable statutory rates |  | $ | 308 |  | 26.9 | % | $ | 299 |  | 27.1 | %
Revaluation of deferred income tax liability to reflect future income tax rates |  |  | (121) |  | (10.6) |  |  | — |  | — |
Adjustments recognized in the current period for income taxes of prior periods |  |  | (2) |  | (0.2) |  |  | — |  | — |
Other |  |  | 3 |  | 0.3 |  |  | (3) |  | (0.4) |
Income tax expense per Consolidated statements of income and other comprehensive income |  | $ | 188 |  | 16.4 | % | $ | 296 |  | 26.7 | %

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