| Subclassifications of assets, liabilities and equities [abstract] | ||
| Investments in subsidiaries, joint ventures and associates [abstract] | ||
| Investments in subsidiaries | ||
| Investments in joint ventures | ||
| Investments in associates | ||
| Investments in subsidiaries, joint ventures and associates | ||
| Cash and cash equivalents [abstract] | ||
| Cash [abstract] | ||
| Cash on hand | ||
| Balances with banks | ||
| Cash | ||
| Cash equivalents [abstract] | ||
| Short-term deposits, classified as cash equivalents | ||
| Short-term investments, classified as cash equivalents | ||
| Other banking arrangements, classified as cash equivalents | ||
| Cash equivalents | ||
| Other cash and cash equivalents | ||
| Cash and cash equivalents | ||
| Borrowings [abstract] | ||
| Non-current portion of non-current borrowings | ||
| Current borrowings and current portion of non-current borrowings [abstract] | ||
| Current borrowings | ||
| Current portion of non-current borrowings | ||
| Current borrowings and current portion of non-current borrowings | ||
| Borrowings | ||