Other Intangible Assets - Other Intangible Assets (Detail) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Finite And Indefinite Lived Intangible Assets [Line Items]
Amortized intangibles, Gross Amounts	$ 4,645	$ 4,582
Amortized intangibles, Accumulated Amortization	(3,057)	(2,953)
Trade names and trademarks
Finite And Indefinite Lived Intangible Assets [Line Items]
Amortized intangibles, Gross Amounts	110	110
Amortized intangibles, Accumulated Amortization	(97)	(96)
Customer - related intangibles
Finite And Indefinite Lived Intangible Assets [Line Items]
Amortized intangibles, Gross Amounts	2,558	2,558
Amortized intangibles, Accumulated Amortization	(1,717)	(1,689)
Covenants-not-to-compete
Finite And Indefinite Lived Intangible Assets [Line Items]
Amortized intangibles, Gross Amounts	26	26
Amortized intangibles, Accumulated Amortization	(26)	(26)
Content database
Finite And Indefinite Lived Intangible Assets [Line Items]
Amortized intangibles, Gross Amounts	168	168
Amortized intangibles, Accumulated Amortization	(70)	(67)
Computer software
Finite And Indefinite Lived Intangible Assets [Line Items]
Amortized intangibles, Gross Amounts	1,634	1,572
Amortized intangibles, Accumulated Amortization	(1,017)	(947)
Patents and other
Finite And Indefinite Lived Intangible Assets [Line Items]
Amortized intangibles, Gross Amounts	149	148
Amortized intangibles, Accumulated Amortization	(130)	(128)
Trade names and trademarks
Finite And Indefinite Lived Intangible Assets [Line Items]
Indefinite-lived intangibles, Gross Amounts	$ 1,833	$ 1,833

Schedule of finite and indefinite lived intangible assets.

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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6473545&loc=d3e61844-108004

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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