Segments - Business Segment Information (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Revenues		$ 1,563	$ 1,610
Depreciation and amortization		179	167
Restructuring charges		35	24
Share-based compensation expense		15	13
Other items	[1]	12	12
Operating income/(loss)		174	207
Business segment income/(loss)	[2]	415	423
Total assets		15,742		$ 15,179
Operating Segments | Connect
Segment Reporting Information [Line Items]
Revenues		737	786
Depreciation and amortization		55	54
Restructuring charges		22	15
Share-based compensation expense		4	4
Operating income/(loss)		(2)	14
Business segment income/(loss)	[2]	79	87
Total assets		5,558		5,416
Operating Segments | Media
Segment Reporting Information [Line Items]
Revenues		826	824
Depreciation and amortization		123	112
Restructuring charges		7	9
Share-based compensation expense		3	3
Operating income/(loss)		214	223
Business segment income/(loss)	[2]	347	347
Total assets		9,878		9,641
Corporate
Segment Reporting Information [Line Items]
Depreciation and amortization		1	1
Restructuring charges		6
Share-based compensation expense		8	6
Other items	[1]	12	12
Operating income/(loss)		(38)	(30)
Business segment income/(loss)	[2]	(11)	$ (11)
Total assets		$ 306		$ 122

[1] Other items primarily consist of business optimization costs, including strategic review costs, and transaction related costs for the three months ended March 31, 2019. Other items primarily consists of transaction related costs and business optimization costs for the three months ended March 31, 2018.

[2] The Company’s chief operating decision maker uses business segment income/(loss) to measure performance from period to period both at the consolidated level as well as within its operating segments.