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Significant transactions (Details) - USD ($) $ in Millions |  |  | 6 Months Ended
--- | --- | --- | ---
Jun. 08, 2021 | May 27, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Significant Transactions [Line Items] |  |  |  |
Purchase of intangible assets |  |  | $ 411 | $ 32
Simbrinza |  |  |  |
Significant Transactions [Line Items] |  |  |  |
Purchase of intangible assets | $ 355 |  |  |
Series 2030 notes |  |  |  |
Significant Transactions [Line Items] |  |  |  |
Proceeds from borrowings |  | $ 750 |  |
Borrowings, interest rate |  | 2.60% |  |

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- Definition The cash outflow for the purchases of intangible assets, classified as investing activities. [Refer: Intangible assets other than goodwill] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2020-01-01 -Paragraph 16 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2020-en-r&anchor=para_16_a&doctype=Standard -URIDate 2020-01-01 + Details
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