Acquisitions and Divestiture - Purchase Price Allocation (Detail) - USD ($) $ in Millions					12 Months Ended
	Nov. 30, 2021	Sep. 15, 2021	Mar. 19, 2021	Feb. 13, 2020	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2019
Business Acquisition [Line Items]
Goodwill					$ 4,556	$ 5,999	$ 3,722
PassFort
Business Acquisition [Line Items]
Cash	$ 10
Accounts receivable	1
Total intangible assets	23
Goodwill	138
Liabilities:
Accounts payable and accrued liabilities	(7)
Deferred revenue	(1)
Deferred tax liabilities	(6)
Total liabilities	(14)
Net assets acquired	$ 158
Weighted average life of intangible assets acquired (in years)	9 years
PassFort | Customer relationships
Business Acquisition [Line Items]
Total intangible assets	$ 8
Liabilities:
Weighted average life of intangible assets acquired acquired (in years)	16 years
PassFort | Product technology
Business Acquisition [Line Items]
Total intangible assets	$ 14
Liabilities:
Weighted average life of intangible assets acquired acquired (in years)	5 years
PassFort | Trade names
Business Acquisition [Line Items]
Total intangible assets	$ 1
Liabilities:
Weighted average life of intangible assets acquired acquired (in years)	4 years
RMS
Business Acquisition [Line Items]
Cash		$ 60
Accounts receivable		38
Other current assets		11
Property and equipment		13
Operating lease right-of-use assets		64
Total intangible assets		779
Goodwill		1,376
Deferred tax assets, net		48
Other assets		99
Liabilities:
Accounts payable and accrued liabilities		(92)
Deferred revenue		(89)
Operating lease liabilities		(68)
Deferred tax liabilities		(214)
Other liabilities		(2)
Uncertain tax positions		(96)
Total liabilities		(561)
Net assets acquired		$ 1,927
Weighted average life of intangible assets acquired (in years)		18 years
RMS | Customer relationships
Business Acquisition [Line Items]
Total intangible assets		$ 518
Liabilities:
Weighted average life of intangible assets acquired acquired (in years)		23 years
RMS | Product technology
Business Acquisition [Line Items]
Total intangible assets		$ 212
Liabilities:
Weighted average life of intangible assets acquired acquired (in years)		7 years
RMS | Trade names
Business Acquisition [Line Items]
Total intangible assets		$ 49
Liabilities:
Weighted average life of intangible assets acquired acquired (in years)		9 years
Cortera
Business Acquisition [Line Items]
Cash			$ 4
Accounts receivable			2
Current assets			7
Total intangible assets			57
Goodwill			79
Deferred tax assets, net			16
Other assets			2
Liabilities:
Accounts payable and accrued liabilities			(1)
Deferred revenue			(4)
Deferred tax liabilities			(15)
Other liabilities			(2)
Total liabilities			(22)
Net assets acquired			$ 139
Weighted average life of intangible assets acquired (in years)			11 years
Cortera | Customer relationships
Business Acquisition [Line Items]
Total intangible assets			$ 9
Liabilities:
Weighted average life of intangible assets acquired acquired (in years)			18 years
Cortera | Database
Business Acquisition [Line Items]
Total intangible assets			$ 38
Liabilities:
Weighted average life of intangible assets acquired acquired (in years)			10 years
Cortera | Product technology
Business Acquisition [Line Items]
Total intangible assets			$ 9
Liabilities:
Weighted average life of intangible assets acquired acquired (in years)			8 years
Cortera | Trade names
Business Acquisition [Line Items]
Total intangible assets			$ 1
Liabilities:
Weighted average life of intangible assets acquired acquired (in years)			5 years
Regulatory DataCorp
Business Acquisition [Line Items]
Cash				$ 6
Accounts receivable				14
Current assets				24
Total intangible assets				280
Goodwill				494
Other assets				2
Liabilities:
Accounts payable and accrued liabilities				(5)
Deferred revenue				(20)
Deferred tax liabilities				(71)
Other liabilities				(2)
Total liabilities				(98)
Net assets acquired				$ 702
Weighted average life of intangible assets acquired (in years)				19 years
Regulatory DataCorp | Customer relationships
Business Acquisition [Line Items]
Total intangible assets				$ 174
Liabilities:
Weighted average life of intangible assets acquired acquired (in years)				25 years
Regulatory DataCorp | Database
Business Acquisition [Line Items]
Total intangible assets				$ 86
Liabilities:
Weighted average life of intangible assets acquired acquired (in years)				10 years
Regulatory DataCorp | Product technology
Business Acquisition [Line Items]
Total intangible assets				$ 17
Liabilities:
Weighted average life of intangible assets acquired acquired (in years)				4 years
Regulatory DataCorp | Trade names
Business Acquisition [Line Items]
Total intangible assets				$ 3
Liabilities:
Weighted average life of intangible assets acquired acquired (in years)				3 years
Acquire Media, ZM Financial Systems & Catylist Inc.
Business Acquisition [Line Items]
Current assets					5
Total intangible assets					82
Goodwill					131
Other assets					3
Liabilities:
Current liabilities					(8)
Long-term liabilities					(8)
Total liabilities					(16)
Net assets acquired					$ 205
Weighted average life of intangible assets acquired (in years)					14 years
Acquire Media, ZM Financial Systems & Catylist Inc. | Customer relationships
Business Acquisition [Line Items]
Total intangible assets					$ 47
Liabilities:
Weighted average life of intangible assets acquired acquired (in years)					18 years
Acquire Media, ZM Financial Systems & Catylist Inc. | Database
Business Acquisition [Line Items]
Total intangible assets					$ 8
Liabilities:
Weighted average life of intangible assets acquired acquired (in years)					10 years
Acquire Media, ZM Financial Systems & Catylist Inc. | Product technology
Business Acquisition [Line Items]
Total intangible assets					$ 23
Liabilities:
Weighted average life of intangible assets acquired acquired (in years)					8 years
Acquire Media, ZM Financial Systems & Catylist Inc. | Trade names
Business Acquisition [Line Items]
Total intangible assets					$ 4
Liabilities:
Weighted average life of intangible assets acquired acquired (in years)					14 years