Guarantor Financial Information - Condensed Consolidated Balance Sheet (Unaudited) (Detail) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 359	$ 454	$ 402	$ 524
Trade and other receivables, net	1,182	1,103
Prepaid expenses and other current assets	473	420
Total current assets	2,014	1,977
Non-current assets
Property, plant and equipment, net	426	466
Operating lease right-of-use asset	378	393
Goodwill	5,979	5,993
Other intangible assets, net	4,806	4,881
Deferred tax assets	267	276
Other non-current assets	323	333
Total assets	14,193	14,319
Current liabilities
Accounts payable and other current liabilities	1,077	1,182
Deferred revenues	402	345
Income tax liabilities	35	60
Current portion of long-term debt, finance lease obligations and short-term borrowings	1,054	914
Total current liabilities	2,568	2,501
Non-current liabilities
Long-term debt and finance lease obligations	7,359	7,395
Deferred tax liabilities	1,031	1,052
Operating lease liabilities	363	370
Other non-current liabilities	641	613
Total liabilities	11,962	11,931
Total stockholders’ equity	2,044	2,195
Noncontrolling interests	187	193
Total equity	2,231	2,388	2,989	3,043
Total liabilities and equity	14,193	14,319
Parent
Current assets
Cash and cash equivalents	11	2	3	3
Intercompany receivables	5	7
Total current assets	16	9
Non-current assets
Deferred tax assets	1	1
Equity investment in subsidiaries	2,002	2,170
Intercompany loans	25	25
Total assets	2,044	2,205
Current liabilities
Accounts payable and other current liabilities		10
Total current liabilities		10
Non-current liabilities
Total liabilities		10
Total stockholders’ equity	2,044	2,195
Total equity	2,044	2,195
Total liabilities and equity	2,044	2,205
Issuers
Current assets
Cash and cash equivalents	1		2
Intercompany receivables	1,770	1,615
Total current assets	1,771	1,615
Non-current assets
Equity investment in subsidiaries	1,282	1,298
Intercompany loans	8,887	8,887
Total assets	11,940	11,800
Current liabilities
Accounts payable and other current liabilities	104	62
Current portion of long-term debt, finance lease obligations and short-term borrowings	868	861
Intercompany payables		3
Total current liabilities	972	926
Non-current liabilities
Long-term debt and finance lease obligations	7,274	7,302
Deferred tax liabilities	71	71
Other non-current liabilities	64	22
Total liabilities	8,381	8,321
Total stockholders’ equity	3,559	3,479
Total equity	3,559	3,479
Total liabilities and equity	11,940	11,800
Guarantor
Current assets
Cash and cash equivalents	44	48	60	79
Trade and other receivables, net	493	404
Prepaid expenses and other current assets	335	291
Intercompany receivables	244	278
Total current assets	1,116	1,021
Non-current assets
Property, plant and equipment, net	273	292
Operating lease right-of-use asset	184	190
Goodwill	5,115	5,103
Other intangible assets, net	4,305	4,370
Other non-current assets	250	256
Equity investment in subsidiaries	3,176	4,576
Intercompany loans	879	896
Total assets	15,298	16,704
Current liabilities
Accounts payable and other current liabilities	467	517
Deferred revenues	246	217
Income tax liabilities	1	4
Current portion of long-term debt, finance lease obligations and short-term borrowings	179	46
Intercompany payables	1,830	1,689
Total current liabilities	2,723	2,473
Non-current liabilities
Long-term debt and finance lease obligations	75	80
Deferred tax liabilities	876	887
Operating lease liabilities	209	213
Intercompany loans	9,053	10,516
Other non-current liabilities	360	365
Total liabilities	13,296	14,534
Total stockholders’ equity	2,002	2,170
Total equity	2,002	2,170
Total liabilities and equity	15,298	16,704
Non-Guarantor
Current assets
Cash and cash equivalents	303	404	$ 337	$ 442
Trade and other receivables, net	689	699
Prepaid expenses and other current assets	138	129
Intercompany receivables	55	69
Total current assets	1,185	1,301
Non-current assets
Property, plant and equipment, net	153	174
Operating lease right-of-use asset	194	203
Goodwill	864	890
Other intangible assets, net	501	511
Deferred tax assets	266	275
Other non-current assets	73	77
Intercompany loans	141	1,605
Total assets	3,377	5,036
Current liabilities
Accounts payable and other current liabilities	506	593
Deferred revenues	156	128
Income tax liabilities	34	56
Current portion of long-term debt, finance lease obligations and short-term borrowings	7	7
Intercompany payables	244	277
Total current liabilities	947	1,061
Non-current liabilities
Long-term debt and finance lease obligations	10	13
Deferred tax liabilities	84	94
Operating lease liabilities	154	157
Intercompany loans	879	897
Other non-current liabilities	217	226
Total liabilities	2,291	2,448
Total stockholders’ equity	899	2,395
Noncontrolling interests	187	193
Total equity	1,086	2,588
Total liabilities and equity	3,377	5,036
Consolidation Eliminations
Current assets
Intercompany receivables	(2,074)	(1,969)
Total current assets	(2,074)	(1,969)
Non-current assets
Equity investment in subsidiaries	(6,460)	(8,044)
Intercompany loans	(9,932)	(11,413)
Total assets	(18,466)	(21,426)
Current liabilities
Intercompany payables	(2,074)	(1,969)
Total current liabilities	(2,074)	(1,969)
Non-current liabilities
Intercompany loans	(9,932)	(11,413)
Total liabilities	(12,006)	(13,382)
Total stockholders’ equity	(6,460)	(8,044)
Total equity	(6,460)	(8,044)
Total liabilities and equity	$ (18,466)	$ (21,426)