Long-Term Debt (Details 1) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Long-Term Debt (Table Amounts) [Abstract]
Total long-term debt	$ 3,940	$ 4,714
Less current portion	5	774
Long-term debt, net of current portion	3,935	3,940
2011
Long-Term Debt (Table Amounts) [Abstract]
Long term Debt interest rate	7.13%
Total long-term debt		769
2014
Long-Term Debt (Table Amounts) [Abstract]
Long term Debt interest rate	3.70%
Total long-term debt	350	350
2015
Long-Term Debt (Table Amounts) [Abstract]
Long term Debt interest rate	1.85%
Total long-term debt	500	500
2016
Long-Term Debt (Table Amounts) [Abstract]
Long term Debt interest rate	7.75%
Total long-term debt	107	107
2018
Long-Term Debt (Table Amounts) [Abstract]
Long term Debt interest rate	6.75%
Total long-term debt	200	200
2019
Long-Term Debt (Table Amounts) [Abstract]
Long term Debt interest rate	5.05%
Total long-term debt	500	500
2021
Long-Term Debt (Table Amounts) [Abstract]
Long term Debt interest rate	3.50%
Total long-term debt	700	700
2026
Long-Term Debt (Table Amounts) [Abstract]
Long term Debt interest rate	7.81%
Total long-term debt	527	527
2031
Long-Term Debt (Table Amounts) [Abstract]
Long term Debt interest rate	7.75%
Total long-term debt	466	466
2040
Long-Term Debt (Table Amounts) [Abstract]
Long term Debt interest rate	5.05%
Total long-term debt	300	300
Capital Leases
Long-Term Debt (Table Amounts) [Abstract]
Total long-term debt	37	41
Other
Long-Term Debt (Table Amounts) [Abstract]
Total long-term debt	$ 253	$ 254