The below analysis assumes that all other variables (except for the interest rate), in particular foreign currency rates, remain constant.
| As at December 31, 2017 | |||
| Impact on profit (loss) | |||
| Decrease of 1% in interest | Decrease of 0.5% in interest | Increase of 0.5% in interest | Increase of 1% in interest |
| $ millions | $ millions | $ millions | $ millions |
- * | - * | |||