Revenue Recognition - Summary of Revenue Disaggregated by Major Product Offerings and Timing of Revenue Recognition (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation Of Revenue [Line Items]
Revenues	$ 882	$ 861	$ 1,759	$ 1,724
Operating Segments | Products Transferred at a Point in Time
Disaggregation Of Revenue [Line Items]
Revenues	100	98	198	187
Operating Segments | Products and Services Transferred Over Time
Disaggregation Of Revenue [Line Items]
Revenues	782	763	1,561	1,537
Media | Operating Segments
Disaggregation Of Revenue [Line Items]
Revenues	882	861	1,759	1,724
Media | Operating Segments | Measurement
Disaggregation Of Revenue [Line Items]
Revenues	644	629	1,289	1,261
Media | Operating Segments | Impact/Content
Disaggregation Of Revenue [Line Items]
Revenues	$ 238	$ 232	$ 470	$ 463