Debt (Schedule Of Outstanding Debt) (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011	Jun. 27, 2011
Long-term debt, current and noncurrent	$ 2,923	$ 2,928
Current portion of long-term debt	259	260
Long-term debt and capital lease obligations	2,664	2,668
Senior Debt Obligations Due 2012 [Member]
Long-term debt and capital lease obligations	0	250
Debt instrument, interest rate, stated percentage	6.25%
Debt instrument, interest rate, effective percentage	5.10%
Senior Debt Obligations Due 2013 [Member]
Long-term debt and capital lease obligations	250	251
Debt instrument, interest rate, stated percentage	4.85%
Senior Debt Obligations Due 2033 [Member]
Long-term debt and capital lease obligations	296	296
Debt instrument, interest rate, stated percentage	5.875%
Senior Debt Obligations Due 2014 [Member]
Long-term debt and capital lease obligations	326	326
Debt instrument, interest rate, stated percentage	5.375%		5.375%
Senior Debt Obligations Due 2015 [Member]
Long-term debt and capital lease obligations	479	479
Debt instrument, interest rate, stated percentage	5.75%
Senior Debt Obligations Due 2017 [Member]
Long-term debt and capital lease obligations	248	0
Debt instrument, interest rate, stated percentage	2.30%
Senior Debt Obligations Due 2019 [Member]
Long-term debt and capital lease obligations	398	398
Debt instrument, interest rate, stated percentage	9.25%
Senior Debt Obligations Due 2021 [Member]
Long-term debt and capital lease obligations	496	496
Debt instrument, interest rate, stated percentage	4.80%
Mortgage Due 2035 [Member]
Long-term debt and capital lease obligations	429	431
Debt instrument, interest rate, stated percentage	5.70%
Other [Member]
Long-term debt and capital lease obligations	$ 1	$ 1