Property and Equipment - Schedule of Property and Equipment (Parenthetical) (Detail) $ in Millions	Jun. 30, 2021 USD ($)
Property Plant And Equipment [Abstract]
Property and equipment, net	$ 77

Amount classified as property, plant and equipment attributable to disposal group held for sale or disposed of.

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Name:	us-gaap_DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant