Acquisition - Intangible Allocation (Detail) - 2022 Business Acquisitions [Member] $ in Millions	Sep. 30, 2022 USD ($)
Intangible assets
Other intangible assets	$ 51
Customer Relationships [Member]
Intangible assets
Other intangible assets	34
Non-compete Covenant [Member]
Intangible assets
Other intangible assets	$ 17

Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=128092470&loc=d3e4845-128472

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