Guarantor and Non-Guarantor Supplemental Financial Information - Schedule of Balance Sheet Information (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
ASSETS
Total current assets	$ 3,450,251	$ 2,976,261
Investment in subsidiaries	0	0
Intangible assets, net	2,446,652	2,793,954
Goodwill	7,942,023	7,992,941	$ 3,955,901
Other assets, net	1,938,620	1,722,519
TOTAL ASSETS	15,777,546	15,485,675
LIABILITIES AND STOCKHOLDERS’ EQUITY
Total current liabilities	6,127,198	5,926,017
Long-term debt	3,159,336	3,183,140
Other liabilities	797,909	788,273
Redeemable non-controlling interests	0	658,478	560,073	$ 364,871
Stockholders’ equity	5,693,103	4,929,767	$ 1,893,729	$ 2,258,985
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	15,777,546	15,485,675
Reportable Legal Entities | Parent
ASSETS
Total current assets	293,759	230,840
Investment in subsidiaries	9,536,273	8,420,890
Intangible assets, net	0	0
Goodwill	0	0
Other assets, net	4,107	33
TOTAL ASSETS	9,834,139	8,651,763
LIABILITIES AND STOCKHOLDERS’ EQUITY
Total current liabilities	981,700	538,856
Long-term debt	3,159,336	3,183,140
Other liabilities	0	0
Redeemable non-controlling interests		0
Stockholders’ equity	5,693,103	4,929,767
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	9,834,139	8,651,763
Reportable Legal Entities | Guarantor Subsidiaries
ASSETS
Total current assets	2,535,711	2,261,450
Investment in subsidiaries	3,410,687	3,106,719
Intangible assets, net	1,921,519	1,974,968
Goodwill	6,392,479	5,859,457
Other assets, net	1,608,218	1,381,837
TOTAL ASSETS	15,868,614	14,584,431
LIABILITIES AND STOCKHOLDERS’ EQUITY
Total current liabilities	5,733,755	5,511,639
Long-term debt	0	0
Other liabilities	629,634	620,685
Redeemable non-controlling interests		0
Stockholders’ equity	9,505,225	8,452,107
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	15,868,614	14,584,431
Reportable Legal Entities | Non-Guarantor Subsidiaries
ASSETS
Total current assets	1,829,191	1,201,064
Investment in subsidiaries	0	0
Intangible assets, net	525,133	818,986
Goodwill	1,549,544	2,133,484
Other assets, net	331,818	354,482
TOTAL ASSETS	4,235,686	4,508,016
LIABILITIES AND STOCKHOLDERS’ EQUITY
Total current liabilities	620,153	592,615
Long-term debt	0	0
Other liabilities	173,798	181,421
Redeemable non-controlling interests		658,478
Stockholders’ equity	3,441,735	3,075,502
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	4,235,686	4,508,016
Eliminations
ASSETS
Total current assets	(1,208,410)	(717,093)
Investment in subsidiaries	(12,946,960)	(11,527,609)
Intangible assets, net	0	0
Goodwill	0	0
Other assets, net	(5,523)	(13,833)
TOTAL ASSETS	(14,160,893)	(12,258,535)
LIABILITIES AND STOCKHOLDERS’ EQUITY
Total current liabilities	(1,208,410)	(717,093)
Long-term debt	0	0
Other liabilities	(5,523)	(13,833)
Redeemable non-controlling interests		0
Stockholders’ equity	(12,946,960)	(11,527,609)
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ (14,160,893)	$ (12,258,535)