Defined Severance Benefits - Narrative (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Retirement Benefits [Abstract]
Current defined severance liabilities	$ 76	$ 58
Noncurrent defined severance liabilities	207	107
Accumulated benefit obligation	$ 210	$ 147

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

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant