Debt (Schedule Of Outstanding Debt) (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2013 Senior Debt Obligations Due 2013 [Member]	Dec. 31, 2012 Senior Debt Obligations Due 2013 [Member]	Mar. 31, 2013 Senior Debt Obligations Due 2033 [Member]	Dec. 31, 2012 Senior Debt Obligations Due 2033 [Member]	Mar. 31, 2013 Senior Debt Obligations Due 2014 [Member]	Dec. 31, 2012 Senior Debt Obligations Due 2014 [Member]	Jun. 27, 2011 Senior Debt Obligations Due 2014 [Member]	Mar. 31, 2013 Senior Debt Obligations Due 2015 [Member]	Dec. 31, 2012 Senior Debt Obligations Due 2015 [Member]	Mar. 31, 2013 Senior Debt Obligations Due 2017 [Member]	Dec. 31, 2012 Senior Debt Obligations Due 2017 [Member]	Mar. 31, 2012 Senior Debt Obligations Due 2017 [Member]	Mar. 31, 2013 Senior Debt Obligations Due 2019 [Member]	Dec. 31, 2012 Senior Debt Obligations Due 2019 [Member]	Mar. 31, 2013 Senior Debt Obligations Due 2021 [Member]	Dec. 31, 2012 Senior Debt Obligations Due 2021 [Member]	Mar. 31, 2013 Mortgage Due 2035 [Member]	Dec. 31, 2012 Mortgage Due 2035 [Member]	Mar. 31, 2013 Other [Member]	Dec. 31, 2012 Other [Member]	Mar. 31, 2013 Three-Year Delayed Draw Term Loan Facility [Member]	Dec. 31, 2012 Three-Year Delayed Draw Term Loan Facility [Member]
Long-term debt and capital lease obligations	$ 2,705,000,000	$ 2,658,000,000	$ 0	$ 250,000,000	$ 297,000,000	$ 296,000,000	$ 324,000,000	$ 326,000,000		$ 479,000,000	$ 479,000,000	$ 249,000,000	$ 249,000,000		$ 398,000,000	$ 398,000,000	$ 497,000,000	$ 497,000,000	$ 420,000,000	$ 422,000,000	$ 1,000,000	$ 1,000,000
Revolving credit facility, amount outstanding	0																						50,000,000	0
Long-term debt, current and noncurrent	2,715,000,000	2,918,000,000
Current portion of long-term debt	$ 10,000,000	$ 260,000,000
Debt instrument, interest rate, stated percentage			4.85%		5.875%		5.375%		5.375%	5.75%		2.30%		2.30%	9.25%		4.80%		5.70%