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Loans, borrowings, leases, cash and cash equivalents and short-term investments - Funding and repayments (Details) € in Millions, $ in Millions	1 Months Ended					12 Months Ended
	Dec. 31, 2021 USD ($)	Oct. 31, 2021 USD ($)	Mar. 31, 2021 USD ($)	Mar. 31, 2021 EUR (€)	Jan. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 EUR (€)	Dec. 31, 2019 USD ($)
Disclosure of detailed information about borrowings [line items]
Loans and borrowings from third-parties						$ 930
Premium paid on early redemption of debt security						$ 63		$ 265
3.75% bonds
Disclosure of detailed information about borrowings [line items]
Interest rate on bonds	3.75%		3.75%	3.75%		3.75%	3.75%
Amount of bond redeemed			$ 886	€ 750		$ 884	€ 750
Premium paid on early redemption of debt security			$ 63			$ 63
New Development Bank
Disclosure of detailed information about borrowings [line items]
Loans and borrowings from third-parties					$ 300
Commercial bank and Japanese development bank
Disclosure of detailed information about borrowings [line items]
Loans and borrowings from third-parties	$ 280	$ 350

X

- Definition

The interest rate on borrowings. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-URIDate 2021-03-24

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

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- Definition

The cash inflow from borrowings obtained. [Refer: Borrowings]

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Name IAS
-Number 7
-IssueDate 2021-01-01
-Paragraph 17
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- Definition

The cash outflow for repayments of bonds, notes and debentures.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-IssueDate 2021-01-01
-Paragraph 17
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- Definition

The amount of expenses incurred in connection with cash tender offer repurchased.

+ References

No definition available.

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- Details

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