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Related Parties - Summary of Directors and Executive Board Management Compensation (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Directors [member]
Disclosure of transactions between related parties [line items]
Short-term employee benefits	$ 2	$ 2	$ 2
Share-based payment
Total Compensation	2	2	2
Executive Committee [member]
Disclosure of transactions between related parties [line items]
Short-term employee benefits	24	4	9
Termination benefits	0	2	1
Share-based payment	33	7	25
Total Compensation	$ 57	$ 13	$ 35

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- Definition

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.

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The amount of compensation to key management personnel. [Refer: Key management personnel of entity or parent [member]]

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