Statement Of Cash Flows [Abstract]
| Concept |
As at 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2021-01-01 to 2021-12-31 |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2019-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of cash flows [abstract] | |||||||||||||
| Cash flows from (used in) operating activities [abstract] | |||||||||||||
| Profit (loss) | — |
-
USD
|
-
USD
|
-
USD
|
179,400,000
USD
|
179,400,000
USD
|
321,500,000
USD
|
— |
-
USD
|
321,500,000
USD
|
-
USD
|
-
USD
|
— |
| Adjustments to reconcile profit (loss) [abstract] | |||||||||||||
| Adjustments for increase (decrease) in trade accounts payable | — | — | — | — |
15,200,000
USD
|
— | — | — | — |
23,100,000
USD
|
— | — | — |
| Adjustments for undistributed profits of associates | — | — | — | — |
1,100,000
USD
|
— | — | — | — |
30,000,000
USD
|
— | — | — |
| Adjustments for losses (gains) on disposal of non-current assets | — | — | — | — |
300,000
USD
|
— | — | — | — |
-
USD
|
— | — | — |
| Other adjustments to reconcile profit (loss) | — | — | — | — |
800,000
USD
|
— | — | — | — |
2,300,000
USD
|
— | — | — |
| Cash flows from (used in) operating activities | — | — | — | — |
326,600,000
USD
|
— | — | — | — |
366,500,000
USD
|
— | — | — |
| Cash flows from (used in) investing activities [abstract] | |||||||||||||
| Purchase of property, plant and equipment, classified as investing activities | — | — | — | — |
35,400,000
USD
|
— | — | — | — |
32,800,000
USD
|
— | — | — |
| Cash flows from (used in) investing activities | — | — | — | — |
171,900,000
USD
|
— | — | — | — |
254,600,000
USD
|
— | — | — |
| Cash flows from (used in) financing activities [abstract] | |||||||||||||
| Proceeds from issuing shares | — | — | — | — |
-
USD
|
— | — | — | — |
91,900,000
USD
|
— | — | — |
| Repayments of borrowings, classified as financing activities | — | — | — | — |
-
USD
|
— | — | — | — |
240,300,000
USD
|
— | — | — |
| Payments of lease liabilities, classified as financing activities | — | — | — | — |
40,300,000
USD
|
— | — | — | — |
43,100,000
USD
|
— | — | — |
| Cash flows from (used in) financing activities | — | — | — | — |
141,400,000
USD
|
— | — | — | — |
4,200,000
USD
|
— | — | — |
| Increase (decrease) in cash and cash equivalents after effect of exchange rate changes | — | — | — | — |
13,300,000
USD
|
— | — | — | — |
116,100,000
USD
|
— | — | — |
| Cash and cash equivalents |
170,000,000
USD
|
— | — | — | — | — | — |
156,700,000
USD
|
— | — | — | — |
40,600,000
USD
|