Long-Term Obligations (Schedule Of Carrying Amount Of Convertible Senior Notes) (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Debt Instrument [Line Items]
Long-term debt, net	$ 7,126,377	$ 7,605,734
Total Debt, net	9,099,140	7,605,734
Long-term Debt, Current Portion	1,972,763	0
Total Long-term Debt, Excluding Current Portion	7,126,377	7,605,734
May 2013 Notes [Member]
Debt Instrument [Line Items]
Long-term debt, net	622,763	607,036
Debt Instrument, Interest Rate, Stated Percentage	0.625%
May 2014 Notes [Member]
Debt Instrument [Line Items]
Long-term debt, net	1,195,745	1,181,525
Debt Instrument, Interest Rate, Stated Percentage	1.00%
May 2016 Notes [Member]
Debt Instrument [Line Items]
Long-term debt, net	1,144,866	1,132,293
Debt Instrument, Interest Rate, Stated Percentage	1.625%
April 2021 Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Long-term debt, net	992,495	992,066
Debt Instrument, Interest Rate, Stated Percentage	4.50%
December 2014 Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Long-term debt, net	749,236	749,078
Debt Instrument, Interest Rate, Stated Percentage	2.40%
December 2016 Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Long-term debt, net	698,979	698,864
Debt Instrument, Interest Rate, Stated Percentage	3.05%
December 2021 Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Long-term debt, net	1,247,284	1,247,138
Debt Instrument, Interest Rate, Stated Percentage	4.40%
December 2041 Senior Unsecured Notes [Member]
Debt Instrument [Line Items]
Long-term debt, net	997,772	997,734
Debt Instrument, Interest Rate, Stated Percentage	5.65%
Term Loan Facility due January 2015 [Member]
Debt Instrument [Line Items]
Carrying amount of term loan facility	300,000	0
Credit Facility Due January 2013 [Member]
Debt Instrument [Line Items]
Carrying Amount of Credit Facilities	400,000	0
Credit Facility Due January 2017 [Member]
Debt Instrument [Line Items]
Carrying Amount of Credit Facilities	$ 750,000	$ 0