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		12 Months Ended
	Mar. 31, 2022	Mar. 31, 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	$ 4	$ (75)
Gain on disposal, net of taxes		542	$ 489
Net income/(loss) from discontinued operations, Net of Tax	4	467
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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	4	(13)
Income/(loss) from discontinued operations before income taxes	4	(96)
Benefit/(provision) for income taxes		21
Net income/(loss) from discontinued operations	4	(75)
Gain on disposal before income taxes		379
Benefit/(provision) for income taxes		163
Gain on disposal, net of taxes		542
Net income/(loss) from discontinued operations, Net of Tax	4	467
Net income/(loss) from discontinued operations attributable to Nielsen shareholders	$ 4	$ 467