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Consolidated Statements of Comprehensive Income (Parentheticals) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Statement of comprehensive income [abstract]
Income tax relating to unrealized losses on derivatives designated as cash flow hedges	$ 0	$ 0	$ 0	$ 0
Income tax relating to realized losses on derivatives designated as cash flow hedges	0	0	0	0
Income tax relating to currency translation adjustments	0	0	0	0
Income tax relating to actuarial loss on post employment benefit obligations	0	(3)	3	0
Income tax relating to net change on equity investments	$ (3)	$ 0	$ 5	$ 0

X

- Definition

Income tax relating to reclassification adjustments on cash flow hedges included in other comprehensive income

+ References

No definition available.

+ Details

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X

- Definition

The amount of income tax relating to amounts recognised in other comprehensive income in relation to cash flow hedges. [Refer: Cash flow hedges [member]; Other comprehensive income]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
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-IssueDate 2020-01-01
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X

- Definition

The amount of income tax relating to amounts recognised in other comprehensive income in relation to exchange differences on the translation of financial statements of foreign operations. [Refer: Other comprehensive income; Reserve of exchange differences on translation]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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X

- Definition

The amount of income tax relating to amounts recognised in other comprehensive income in relation to investments in equity instruments that the entity has designated at fair value through other comprehensive income. [Refer: Other comprehensive income; Reserve of gains and losses from investments in equity instruments]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
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X

- Definition

The amount of income tax relating to amounts recognised in other comprehensive income in relation to remeasurements of defined benefit plans. [Refer: Other comprehensive income; Reserve of remeasurements of defined benefit plans; Defined benefit plans [member]]

+ References

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- References

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