Condensed Consolidating Balance Sheet (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2012	Dec. 31, 2011
Assets
Cash and cash equivalents	$ 321	$ 358	$ 307	$ 337
Trade accounts receivable, net	710	661
Prepaid expenses and other current assets	496	391
Assets of discontinued operations		33
Total current assets	1,527	1,443
Intangible assets, net	2,180	1,744
Goodwill	5,217	4,705
Other long-term assets	532	605
Total assets	9,456	8,497
Liabilities and Shareholders' Equity
Accounts payable and accrued expenses	826	721
Current maturities of long-term debt	2	2
Deferred revenue	400	379
Liabilities of discontinued operations		3
Total current liabilities	1,228	1,105
Long-term debt	3,929	3,228
Other long-term liabilities	839	747
Total liabilities	5,996	5,080
Total shareholders' equity	3,460	3,417
Total liabilities and shareholders' equity	9,456	8,497
Parent Company
Assets
Cash and cash equivalents	18	85	41	73
Prepaid expenses and other current assets	96	45
Total current assets	114	130
Investments in consolidated affiliates	10,044	8,498
Intangible assets, net	22	22
Other long-term assets	31	55
Total assets	10,211	8,705
Liabilities and Shareholders' Equity
Accounts payable and accrued expenses	109	73
Total current liabilities	109	73
Long-term debt	3,927	3,223
Due to (from) consolidated affiliates	1,972	1,295
Other long-term liabilities	743	697
Total liabilities	6,751	5,288
Total shareholders' equity	3,460	3,417
Total liabilities and shareholders' equity	10,211	8,705
Guarantor Subsidiaries
Assets
Cash and cash equivalents	75	66	54	71
Trade accounts receivable, net	451	403
Prepaid expenses and other current assets	236	186
Assets of discontinued operations		33
Total current assets	762	688
Intangible assets, net	1,927	1,479
Goodwill	4,149	3,695
Other long-term assets	393	445
Total assets	7,231	6,307
Liabilities and Shareholders' Equity
Accounts payable and accrued expenses	478	417
Current maturities of long-term debt	2	2
Deferred revenue	253	213
Liabilities of discontinued operations		3
Total current liabilities	733	635
Long-term debt	2	4
Due to (from) consolidated affiliates	(1,607)	(988)
Other long-term liabilities	57	22
Total liabilities	(815)	(327)
Total shareholders' equity	8,046	6,634
Total liabilities and shareholders' equity	7,231	6,307
Non-Guarantor Subsidiaries
Assets
Cash and cash equivalents	228	207	212	193
Trade accounts receivable, net	259	258
Prepaid expenses and other current assets	164	160
Total current assets	651	625
Intangible assets, net	231	243
Goodwill	1,068	1,010
Other long-term assets	108	105
Total assets	2,058	1,983
Liabilities and Shareholders' Equity
Accounts payable and accrued expenses	239	231
Deferred revenue	147	166
Total current liabilities	386	397
Long-term debt		1
Due to (from) consolidated affiliates	(365)	(307)
Other long-term liabilities	39	28
Total liabilities	60	119
Total shareholders' equity	1,998	1,864
Total liabilities and shareholders' equity	2,058	1,983
Eliminations
Assets
Investments in consolidated affiliates	(10,044)	(8,498)
Total assets	(10,044)	(8,498)
Liabilities and Shareholders' Equity
Total shareholders' equity	(10,044)	(8,498)
Total liabilities and shareholders' equity	$ (10,044)	$ (8,498)