Discontinued Operations - Summary of Major Classes of Line Items Constituting Net Income from Discontinued Operations, Net of Tax (Detail) - USD ($) $ in Millions	3 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Mar. 31, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Net income/(loss) from discontinued operations				$ 6	$ (94)
(Loss)/gain on disposal, net of taxes			$ 542		534	$ 489
Net income/(loss) from discontinued operations, Net of Tax	$ 1	$ (17)		6	440
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Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Revenues					452
Cost of revenues, exclusive of depreciation and amortization shown separately below					264
Selling, general and administrative expenses, exclusive of depreciation and amortization shown separately below					229
Depreciation and amortization					36
Restructuring charges					6
Operating income/(loss)					(83)
Other income and expenses	1	(9)		6	(32)
Income/(loss) from discontinued operations before income taxes	1	(9)		6	(115)
Benefit/(provision) for income taxes					21
Net income/(loss) from discontinued operations	1	(9)		6	(94)
(Loss)/gain on disposal before income taxes		(8)			371
Benefit/(provision) for income taxes					163
(Loss)/gain on disposal, net of taxes		(8)			534
Net income/(loss) from discontinued operations, Net of Tax	1	(17)		6	440
Net income/(loss) from discontinued operations attributable to Nielsen shareholders	$ 1	$ (17)		$ 6	$ 440