Restructuring (Details) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Segmental restructuring charges associated with reorganization, pre tax
Restructuring Charges, Total	$ 15	$ 0	$ 15	$ (1)
Restructuring Charges Eastern [Member]
Segmental restructuring charges associated with reorganization, pre tax
Restructuring Charges, Total	2		2
Restructuring Charges Midwest [Member]
Segmental restructuring charges associated with reorganization, pre tax
Restructuring Charges, Total	3		3
Restructuring Charges Southern [Member]
Segmental restructuring charges associated with reorganization, pre tax
Restructuring Charges, Total	2		2
Restructuring Charges Western [Member]
Segmental restructuring charges associated with reorganization, pre tax
Restructuring Charges, Total	2		2
Restructuring Charges Wheelabrator [Member]
Segmental restructuring charges associated with reorganization, pre tax
Restructuring Charges, Total	1		1
Restructuring Charges Corporate and other [Member]
Segmental restructuring charges associated with reorganization, pre tax
Restructuring Charges, Total	$ 5		$ 5