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CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME/(LOSS) (unaudited) (parenthetical) - 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]
Actuarial gains/(losses) from defined benefit plans, tax expense (benefit)		$ (2)	$ (5)	$ 7	$ (7)
Fair value adjustments on equity securities, tax expense (benefit)	[1]				$ (3)
[1] Amount is net of tax benefit of $3 million for the six months ended June 30, 2020.

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

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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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