Costs and expenses by nature - Selling and administrative (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Costs and expenses by nature
Selling	$ 25	$ 20	$ 43	$ 37
Personnel	52	40	99	87
Services	22	33	39	51
Depreciation and amortization	10	14	19	31
Others	24	17	38	33
Selling and administrative expenses	133	124	238	239
Total	$ 133	$ 124	$ 238	$ 239

No definition available.

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- Definition

The amount of expenses that the entity does not separately disclose in the same statement or note when the entity uses the 'nature of expense' form for its analysis of expenses. [Refer: Expenses, by nature]

+ References

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- Definition

The amount of expense relating to selling activities of the entity.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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+ Details

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- Definition

The amount of expense relating to selling, general and administrative activities of the entity.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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+ Details

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- Definition

The amount of depreciation and amortization expense in selling and administrative expenses. Depreciation and amortization are the systematic allocations of depreciable amounts of assets over their useful lives

+ References

No definition available.

+ Details

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- Definition

The expense of all forms of consideration given by an entity in exchange for a service rendered by employees or for the termination of employment included in selling and administrative expenses.

+ References

No definition available.

+ Details

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- Definition

The amount of expenses aggregated according to their nature, including discontinued operations.

+ References

No definition available.

+ Details

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- Definition

The services expense included in selling and administrative expenses.

+ References

No definition available.

+ Details

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