Long-Term Debt, Short-Term Debt and Financing Arrangements (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Summary of long-term debt obligations
Long-term debt (including current maturities)	$ 1,162	$ 1,162
Less - maturities classified as current	4	2
Total long-term debt	1,158	1,160
Revolver borrowing due 2014 [Member]
Summary of long-term debt obligations
Secured debt	24	0
Senior term loan due 2012 and 2016 [Member]
Summary of long-term debt obligations
Secured debt	148	149
7 3/4% Senior Notes due 2018 [Member]
Summary of long-term debt obligations
Unsecured debt	225	225
6 7/8% Senior Notes due 2020 [Member]
Summary of long-term debt obligations
Unsecured debt	500	500
8 5/8% Senior Subordinated Notes due 2014 [Member]
Summary of long-term debt obligations
Unsecured debt	0	20
8 1/8% Senior Notes due 2015 [Member]
Summary of long-term debt obligations
Unsecured debt	250	250
Debentures due 2012 through 2025 [Member]
Summary of long-term debt obligations
Unsecured debt	1	1
Customer Notes due 2013 [Member]
Summary of long-term debt obligations
Unsecured debt	3	4
Notes Due 2012 through 2025 [Member]
Summary of long-term debt obligations
Unsecured debt	$ 11	$ 13