Subsidiary Guarantors of Long-Term Debt (Condensed Consolidating Balance Sheet) (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2010	Dec. 31, 2009
ASSETS
Cash and cash equivalents	$ 675	$ 563	$ 338	$ 363
Trade accounts receivable, net	547	572
Prepaid expenses and other current assets	301	282
Total current assets	1,523	1,417
Investments in consolidated affiliates
Goodwill and intangible assets, net	6,247	6,256
Other long-term assets	626	608
Total assets	8,396	8,281
LIABILITIES AND SHAREHOLDERS' EQUITY
Total current liabilities	1,154	891
Long-term debt	3,350	3,353
Due to (from) consolidated affiliates
Other long-term liabilities	806	808
Total liabilities	5,310	5,052
Total shareholders' equity	3,086	3,229
Total liabilities and shareholders' equity	8,396	8,281
Parent Company [Member]
ASSETS
Cash and cash equivalents	452	343	42	55
Trade accounts receivable, net		(2)
Prepaid expenses and other current assets	45	40
Total current assets	497	381
Investments in consolidated affiliates	7,681	7,387
Goodwill and intangible assets, net	13	7
Other long-term assets	28	38
Total assets	8,219	7,813
LIABILITIES AND SHAREHOLDERS' EQUITY
Total current liabilities	369	87
Long-term debt	3,345	3,347
Due to (from) consolidated affiliates	671	396
Other long-term liabilities	748	754
Total liabilities	5,133	4,584
Total shareholders' equity	3,086	3,229
Total liabilities and shareholders' equity	8,219	7,813
Guarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	66	68	152	169
Trade accounts receivable, net	349	374
Prepaid expenses and other current assets	154	130
Total current assets	569	572
Investments in consolidated affiliates
Goodwill and intangible assets, net	5,373	5,405
Other long-term assets	491	470
Total assets	6,433	6,447
LIABILITIES AND SHAREHOLDERS' EQUITY
Total current liabilities	496	490
Long-term debt	5	6
Due to (from) consolidated affiliates	(384)	(152)
Other long-term liabilities	37	39
Total liabilities	154	383
Total shareholders' equity	6,279	6,064
Total liabilities and shareholders' equity	6,433	6,447
Non-Guarantor Subsidiaries [Member]
ASSETS
Cash and cash equivalents	157	152	144	139
Trade accounts receivable, net	198	200
Prepaid expenses and other current assets	102	112
Total current assets	457	464
Investments in consolidated affiliates
Goodwill and intangible assets, net	861	844
Other long-term assets	107	100
Total assets	1,425	1,408
LIABILITIES AND SHAREHOLDERS' EQUITY
Total current liabilities	289	314
Long-term debt
Due to (from) consolidated affiliates	(287)	(244)
Other long-term liabilities	21	15
Total liabilities	23	85
Total shareholders' equity	1,402	1,323
Total liabilities and shareholders' equity	1,425	1,408
Eliminations [Member]
ASSETS
Cash and cash equivalents
Trade accounts receivable, net
Prepaid expenses and other current assets
Total current assets
Investments in consolidated affiliates	(7,681)	(7,387)
Goodwill and intangible assets, net
Other long-term assets
Total assets	(7,681)	(7,387)
LIABILITIES AND SHAREHOLDERS' EQUITY
Total current liabilities
Long-term debt
Due to (from) consolidated affiliates
Other long-term liabilities
Total liabilities
Total shareholders' equity	(7,681)	(7,387)
Total liabilities and shareholders' equity	$ (7,681)	$ (7,387)