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.

No definition available.

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- Definition

The amount of deficit or surplus in a defined benefit plan, adjusted for any effect of limiting a net defined benefit asset to the asset ceiling. [Refer: Defined benefit plans [domain]]

+ References

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

The amount of non-current net defined benefit asset. [Refer: Net defined benefit asset]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

The amount of non-current net defined benefit liability. [Refer: Net defined benefit liability]

+ References

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Retirement benefits - Summary of Retirement Benefits by Financial Position (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of net defined benefit liability (asset) [line items]
Net defined benefit liability (asset)	$ 1,602	$ 2,904
Non-current assets	9,151	10,200
Non-current liabilities:	(7,549)	(7,296)
Pensions
Disclosure of net defined benefit liability (asset) [line items]
Non-current liabilities:	(4,448)	(4,417)
OPEB
Disclosure of net defined benefit liability (asset) [line items]
Non-current liabilities:	(3,101)	(2,879)
Obligations
Disclosure of net defined benefit liability (asset) [line items]
Net defined benefit liability (asset)	(78,024)	(73,481)	$ (107,336)
Obligations \| OPEB
Disclosure of net defined benefit liability (asset) [line items]
Net defined benefit liability (asset)	(3,101)	(2,879)	(4,867)
Plan assets
Disclosure of net defined benefit liability (asset) [line items]
Net defined benefit liability (asset)	79,961	76,756	$ 104,495
Asset ceilings
Disclosure of net defined benefit liability (asset) [line items]
Net defined benefit liability (asset)	$ (335)	$ (371)