Condensed Consolidating Balance Sheet (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
ASSETS
Cash and cash equivalents	$ 358	$ 337	$ 563	$ 363
Trade accounts receivable, net	663	666
Prepaid expenses and other current assets	391	353
Total current assets	1,412	1,356
Intangible assets, net	1,760	1,881
Goodwill	4,719	4,720	4,377
Other long-term assets	606	591
Total assets	8,497	8,548	8,281
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable and accrued expenses	724	836
Current maturities of long-term debt	2	179
Deferred revenue	379	369
Total current liabilities	1,105	1,384
Long-term debt	3,228	3,216
Other long-term liabilities	747	690
Total liabilities	5,080	5,290
Total shareholders' equity	3,417	3,258
Total liabilities and shareholders' equity	8,497	8,548
Parent Company
ASSETS
Cash and cash equivalents	85	73	343	55
Prepaid expenses and other current assets	45	25
Total current assets	130	98
Investments in consolidated affiliates	8,498	7,864
Intangible assets, net	22	15
Other long-term assets	55	28
Total assets	8,705	8,005
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable and accrued expenses	73	222
Current maturities of long-term debt		175
Total current liabilities	73	397
Long-term debt	3,223	3,171
Due to (from) consolidated affiliates	1,295	524
Other long-term liabilities	697	655
Total liabilities	5,288	4,747
Total shareholders' equity	3,417	3,258
Total liabilities and shareholders' equity	8,705	8,005
Guarantor Subsidiaries
ASSETS
Cash and cash equivalents	66	71	68	170
Trade accounts receivable, net	405	402
Prepaid expenses and other current assets	186	167
Total current assets	657	640
Intangible assets, net	1,495	1,597
Goodwill	3,709	3,709
Other long-term assets	446	452
Total assets	6,307	6,398
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable and accrued expenses	420	404
Current maturities of long-term debt	2	4
Deferred revenue	213	208
Total current liabilities	635	616
Long-term debt	4	2
Due to (from) consolidated affiliates	(988)	(344)
Other long-term liabilities	22	12
Total liabilities	(327)	286
Total shareholders' equity	6,634	6,112
Total liabilities and shareholders' equity	6,307	6,398
Non-Guarantor Subsidiaries
ASSETS
Cash and cash equivalents	207	193	152	138
Trade accounts receivable, net	258	264
Prepaid expenses and other current assets	160	161
Total current assets	625	618
Intangible assets, net	243	269
Goodwill	1,010	1,011
Other long-term assets	105	111
Total assets	1,983	2,009
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable and accrued expenses	231	210
Deferred revenue	166	161
Total current liabilities	397	371
Long-term debt	1	43
Due to (from) consolidated affiliates	(307)	(180)
Other long-term liabilities	28	23
Total liabilities	119	257
Total shareholders' equity	1,864	1,752
Total liabilities and shareholders' equity	1,983	2,009
Eliminations
ASSETS
Investments in consolidated affiliates	(8,498)	(7,864)
Total assets	(8,498)	(7,864)
LIABILITIES AND SHAREHOLDERS' EQUITY
Total shareholders' equity	(8,498)	(7,864)
Total liabilities and shareholders' equity	$ (8,498)	$ (7,864)