Statement Of Changes In Equity [Abstract]
| Concept |
2020-01-01 to 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
As at 2020-12-31 |
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 |
As at 2020-12-31 |
2020-01-01 to 2020-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
2019-01-01 to 2019-12-31 |
2019-01-01 to 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
2019-01-01 to 2019-12-31 |
2019-01-01 to 2019-12-31 |
2019-01-01 to 2019-12-31 |
2019-01-01 to 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-12-31 |
As at 2019-01-01 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
As at 2018-12-31 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Statement of changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity [line items] | ||||||||||||||||||||||||||||||||||||||||
| Equity | — |
28,000,000
PLN
|
5,951,000,000
PLN
|
2,000,000
PLN
|
62,000,000
PLN
|
89,000,000
PLN
|
10,597,000,000
PLN
|
3,937,000,000
PLN
|
— |
832,000,000
PLN
|
— | — | — |
10,599,000,000
PLN
|
— |
10,555,000,000
PLN
|
2,000,000
PLN
|
— | — |
10,557,000,000
PLN
|
832,000,000
PLN
|
5,875,000,000
PLN
|
— | — | — | — |
20,000,000
PLN
|
3,937,000,000
PLN
|
50,000,000
PLN
|
59,000,000
PLN
|
10,503,000,000
PLN
|
832,000,000
PLN
|
2,000,000
PLN
|
10,501,000,000
PLN
|
10,503,000,000
PLN
|
51,000,000
PLN
|
20,000,000
PLN
|
13,000,000
PLN
|
3,937,000,000
PLN
|
5,790,000,000
PLN
|
| Changes in equity [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Comprehensive income [abstract] | ||||||||||||||||||||||||||||||||||||||||
| Profit (loss) |
46,000,000
PLN
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
82,000,000
PLN
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Other comprehensive income |
13,000,000
PLN
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
28,000,000
PLN
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Comprehensive income |
33,000,000
PLN
|
— | — | — | — | — | — | — |
46,000,000
PLN
|
— |
3,000,000
PLN
|
13,000,000
PLN
|
3,000,000
PLN
|
— |
33,000,000
PLN
|
— | — |
54,000,000
PLN
|
82,000,000
PLN
|
— | — | — |
7,000,000
PLN
|
54,000,000
PLN
|
27,000,000
PLN
|
8,000,000
PLN
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through other changes, equity |
27,000,000
PLN
|
— | — | — | — | — | — | — |
27,000,000
PLN
|
— | — | — | — | — |
27,000,000
PLN
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Increase (decrease) through share-based payment transactions, equity |
3,000,000
PLN
|
— | — | — | — | — | — | — |
3,000,000
PLN
|
— | — | — | — | — |
3,000,000
PLN
|
— | — |
3,000,000
PLN
|
3,000,000
PLN
|
— | — | — | — |
3,000,000
PLN
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| Amount removed from reserve of cash flow hedges and included in initial cost or other carrying amount of non-financial asset (liability) or firm commitment for which fair value hedge accounting is applied |
21,000,000
PLN
|
— | — | — | — | — | — | — | — | — |
5,000,000
PLN
|
26,000,000
PLN
|
— | — |
21,000,000
PLN
|
— | — |
3,000,000
PLN
|
— | — | — | — | — |
3,000,000
PLN
|
3,000,000
PLN
|
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — |