Schedule of Balance Sheet Information (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
ASSETS
Total current assets	$ 3,640,965	$ 2,219,287
Intangible assets, net	1,087,048	1,111,041
Goodwill	3,696,861	3,663,674
Other assets, net	809,955	745,479
TOTAL ASSETS	9,234,829	7,739,481
LIABILITIES AND STOCKHOLDERS' EQUITY
Total current liabilities	4,857,877	3,294,381
Long-term debt	1,249,448	1,249,412
Other liabilities	1,136,629	936,703
Stockholders' equity	1,990,875	2,258,985
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	9,234,829	7,739,481
Parent
ASSETS
Total current assets	170,655	155,368
Investment in subsidiaries	4,642,857	4,622,473
Other assets, net	3,707	4,069
TOTAL ASSETS	4,817,219	4,781,910
LIABILITIES AND STOCKHOLDERS' EQUITY
Total current liabilities	1,576,896	1,273,513
Long-term debt	1,249,448	1,249,412
Stockholders' equity	1,990,875	2,258,985
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	4,817,219	4,781,910
Guarantor Subsidiaries
ASSETS
Total current assets	4,507,866	2,970,417
Investment in subsidiaries	1,500,425	1,454,747
Intangible assets, net	638,897	639,834
Goodwill	2,436,533	2,436,533
Other assets, net	554,521	538,572
TOTAL ASSETS	9,638,242	8,040,103
LIABILITIES AND STOCKHOLDERS' EQUITY
Total current liabilities	4,473,998	2,970,916
Other liabilities	503,867	432,877
Stockholders' equity	4,660,377	4,636,310
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	9,638,242	8,040,103
Non-Guarantor Subsidiaries
ASSETS
Total current assets	1,046,111	986,293
Intangible assets, net	448,151	471,207
Goodwill	1,260,328	1,227,141
Other assets, net	251,727	202,838
TOTAL ASSETS	3,006,317	2,887,479
LIABILITIES AND STOCKHOLDERS' EQUITY
Total current liabilities	890,650	942,743
Other liabilities	632,762	503,826
Stockholders' equity	1,482,905	1,440,910
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	3,006,317	2,887,479
Eliminations
ASSETS
Total current assets	(2,083,667)	(1,892,791)
Investment in subsidiaries	(6,143,282)	(6,077,220)
TOTAL ASSETS	(8,226,949)	(7,970,011)
LIABILITIES AND STOCKHOLDERS' EQUITY
Total current liabilities	(2,083,667)	(1,892,791)
Stockholders' equity	(6,143,282)	(6,077,220)
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ (8,226,949)	$ (7,970,011)