Employee Benefit Plans - Accumulated Benefit Obligation For Pension Benefit Plans (Detail) - Pension Benefits - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
United States
Defined Contribution And Defined Benefit Plans
Accumulated benefit obligation	$ 474	$ 395
Non-United States Plans
Defined Contribution And Defined Benefit Plans
Accumulated benefit obligation	$ 654	$ 557

Amount of actuarial present value of benefits attributed to employee service rendered, excluding assumptions about future compensation level.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=118255775&loc=d3e1928-114920

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