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Pension benefits - Consolidated Balance Sheet Position (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Retirement Benefits [Abstract]
Defined benefit obligation - Non-current liabilities	$ 0	$ (2)
Deferred tax asset	1	1
Net defined benefit pension asset/(obligation)	$ 1	$ (1)

X

- Definition

This represents the deferred tax liability for underfunded plans recognized in the balance sheet that is associated with the defined benefit pension plans and other postretirement defined benefit plans.

+ References

No definition available.

+ Details

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Period Type:	instant

X

- References

No definition available.

+ Details

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X

- Definition

Amount, before tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

+ References

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Period Type:	instant

X

- Definition

Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as noncurrent.

+ References

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