Segment Information (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Segment Reporting Information
Total Revenues	$ 752,165	$ 758,551	$ 1,498,663	$ 1,504,560
Depreciation and Amortization	77,510	78,868	155,518	159,031
Depreciation	69,606	71,820	139,755	145,158
Amortization	7,904	7,048	15,763	13,873
Adjusted OIBDA	235,590	227,585	456,130	444,884
Total Assets	6,087,212	6,417,359	6,087,212	6,417,359	6,041,258
Expenditures for Segment Assets	155,053	95,627	222,795	185,433
Capital Expenditures	51,445	46,976	107,361	99,184
Cash Paid for Acquisitions, Net of Cash Acquired	98,472	40,467	107,290	75,172
Additions to Customer Relationship and Acquisition Costs	5,136	8,184	8,144	11,077
North American Business
Segment Reporting Information
Total Revenues	551,879	557,513	1,104,189	1,112,811
Depreciation and Amortization	45,272	45,629	89,787	91,045
Depreciation	42,134	42,577	83,531	85,030
Amortization	3,138	3,052	6,256	6,015
Adjusted OIBDA	236,268	242,123	462,615	470,098
Total Assets	4,188,837	4,377,454	4,188,837	4,377,454
Expenditures for Segment Assets	29,932	32,813	69,268	68,863
Capital Expenditures	25,763	25,662	53,696	54,447
Cash Paid for Acquisitions, Net of Cash Acquired	225	407	9,043	5,436
Additions to Customer Relationship and Acquisition Costs	3,944	6,744	6,529	8,980
International Business
Segment Reporting Information
Total Revenues	200,286	201,038	394,474	391,749
Depreciation and Amortization	24,364	25,065	49,770	50,486
Depreciation	19,631	21,105	40,331	42,704
Amortization	4,733	3,960	9,439	7,782
Adjusted OIBDA	42,325	39,449	85,885	78,327
Total Assets	1,740,542	1,846,832	1,740,542	1,846,832
Expenditures for Segment Assets	122,181	59,798	142,475	107,522
Capital Expenditures	22,742	18,298	42,613	35,689
Cash Paid for Acquisitions, Net of Cash Acquired	98,247	40,060	98,247	69,736
Additions to Customer Relationship and Acquisition Costs	1,192	1,440	1,615	2,097
Corporate
Segment Reporting Information
Depreciation and Amortization	7,874	8,174	15,961	17,500
Depreciation	7,841	8,138	15,893	17,424
Amortization	33	36	68	76
Adjusted OIBDA	(43,003)	(53,987)	(92,370)	(103,541)
Total Assets	157,833	193,073	157,833	193,073
Expenditures for Segment Assets	2,940	3,016	11,052	9,048
Capital Expenditures	$ 2,940	$ 3,016	$ 11,052	$ 9,048