Condensed Consolidating Balance Sheet (Detail) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2011	Dec. 31, 2010
ASSETS
Cash and cash equivalents	$ 302	$ 337	$ 675	$ 563
Trade accounts receivable, net	606	666
Prepaid expenses and other current assets	375	353
Total current assets	1,283	1,356
Intangible assets, net	1,814	1,881
Goodwill	4,718	4,720
Other long-term assets	601	591
Total assets	8,416	8,548
LIABILITIES AND SHAREHOLDERS' EQUITY
Total current liabilities	1,235	1,384
Long-term debt	3,237	3,216
Other long-term liabilities	691	690
Total liabilities	5,163	5,290
Total shareholders' equity	3,253	3,258
Total liabilities and shareholders' equity	8,416	8,548
Parent Company
ASSETS
Cash and cash equivalents	14	73	452	343
Prepaid expenses and other current assets	17	25
Total current assets	31	98
Investments in consolidated affiliates	8,154	7,864
Intangible assets, net	22	15
Other long-term assets	41	28
Total assets	8,248	8,005
LIABILITIES AND SHAREHOLDERS' EQUITY
Total current liabilities	332	397
Long-term debt	3,191	3,171
Due to (from) consolidated affiliates	813	524
Other long-term liabilities	659	655
Total liabilities	4,995	4,747
Total shareholders' equity	3,253	3,258
Total liabilities and shareholders' equity	8,248	8,005
Guarantor Subsidiaries
ASSETS
Cash and cash equivalents	72	71	67	68
Trade accounts receivable, net	376	402
Prepaid expenses and other current assets	185	167
Total current assets	633	640
Intangible assets, net	1,536	1,597
Goodwill	3,709	3,709
Other long-term assets	464	452
Total assets	6,342	6,398
LIABILITIES AND SHAREHOLDERS' EQUITY
Total current liabilities	563	616
Long-term debt	2	2
Due to (from) consolidated affiliates	(580)	(344)
Other long-term liabilities	15	12
Total liabilities		286
Total shareholders' equity	6,342	6,112
Total liabilities and shareholders' equity	6,342	6,398
Non-Guarantor Subsidiaries
ASSETS
Cash and cash equivalents	216	193	156	152
Trade accounts receivable, net	230	264
Prepaid expenses and other current assets	173	161
Total current assets	619	618
Intangible assets, net	256	269
Goodwill	1,009	1,011
Other long-term assets	96	111
Total assets	1,980	2,009
LIABILITIES AND SHAREHOLDERS' EQUITY
Total current liabilities	340	371
Long-term debt	44	43
Due to (from) consolidated affiliates	(233)	(180)
Other long-term liabilities	17	23
Total liabilities	168	257
Total shareholders' equity	1,812	1,752
Total liabilities and shareholders' equity	1,980	2,009
Eliminations
ASSETS
Investments in consolidated affiliates	(8,154)	(7,864)
Total assets	(8,154)	(7,864)
LIABILITIES AND SHAREHOLDERS' EQUITY
Total shareholders' equity	(8,154)	(7,864)
Total liabilities and shareholders' equity	$ (8,154)	$ (7,864)