Long-Term Debt And Borrowing Arrangements (Early Extinguishment of Debt) (Details) (USD $) In Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Mar. 31, 2010	Jun. 30, 2011
Long-Term Debt And Borrowing Arrangements
Loss on extinguishment of debt	$ (1)		$ (12)
Interest rate swap loss reclassified to interest expense		14
Cost of repurchase of convertible notes	$ 1	$ 2