Schedule of Balance Sheet Information (Detail) - USD ($) $ in Thousands		Jun. 30, 2016	Dec. 31, 2015
ASSETS
Total current assets		$ 4,163,977	$ 2,976,261
Intangible assets, net		2,646,039	2,793,954
Goodwill		8,019,775	7,992,941
Other assets, net		1,898,751	1,722,519
TOTAL ASSETS		16,728,542	15,485,675
LIABILITIES AND STOCKHOLDERS' EQUITY
Total current liabilities		7,446,755	5,926,017
Long-term debt	[1]	3,196,847	3,183,140
Other liabilities		834,186	788,273
Redeemable noncontrolling interests		983,832	658,478
Stockholders' equity		4,266,922	4,929,767
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY		16,728,542	15,485,675
Eliminations
ASSETS
Total current assets		(1,045,422)	(717,093)
Investment in subsidiaries		(9,805,850)	(11,527,609)
Other assets, net		(19,912)	(13,833)
TOTAL ASSETS		(10,871,184)	(12,258,535)
LIABILITIES AND STOCKHOLDERS' EQUITY
Total current liabilities		(1,045,422)	(717,093)
Other liabilities		(19,912)	(13,833)
Stockholders' equity		(9,805,850)	(11,527,609)
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY		(10,871,184)	(12,258,535)
Parent
ASSETS
Total current assets		263,607	230,840
Investment in subsidiaries		8,043,599	8,420,890
Other assets, net		1,982	33
TOTAL ASSETS		8,309,188	8,651,763
LIABILITIES AND STOCKHOLDERS' EQUITY
Total current liabilities		845,419	538,856
Long-term debt		3,196,847	3,183,140
Stockholders' equity		4,266,922	4,929,767
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY		8,309,188	8,651,763
Guarantor Subsidiaries
ASSETS
Total current assets		3,512,056	2,261,450
Investment in subsidiaries		1,762,251	3,106,719
Intangible assets, net		2,054,909	1,974,968
Goodwill		6,830,839	5,859,457
Other assets, net		1,524,063	1,381,837
TOTAL ASSETS		15,684,118	14,584,431
LIABILITIES AND STOCKHOLDERS' EQUITY
Total current liabilities		6,904,371	5,511,639
Other liabilities		699,331	620,685
Stockholders' equity		8,080,416	8,452,107
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY		15,684,118	14,584,431
Non-Guarantor Subsidiaries
ASSETS
Total current assets		1,433,736	1,201,064
Intangible assets, net		591,130	818,986
Goodwill		1,188,936	2,133,484
Other assets, net		392,618	354,482
TOTAL ASSETS		3,606,420	4,508,016
LIABILITIES AND STOCKHOLDERS' EQUITY
Total current liabilities		742,387	592,615
Other liabilities		154,767	181,421
Redeemable noncontrolling interests		983,832	658,478
Stockholders' equity		1,725,434	3,075,502
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY		$ 3,606,420	$ 4,508,016

[1] Net of applicable discounts and debt issuance costs.