Commitments and Contingencies (Tables)

6 Months Ended

Jun. 30, 2011

Commitments and Contingencies [Abstract]

Restricted Cash and Marketable Securities

Our restricted cash deposits and marketable securities include, among other things, restricted cash held for capital expenditures under certain debt facilities, restricted cash and marketable securities used to settle claims related to our self insurance programs, and restricted cash and marketable securities pledged to regulatory agencies and governmental entities as financial guarantees of our performance related to our final capping, closure and post-closure obligations at our landfills, as follows (in millions):

	June 30,		December 31,
	2011		2010
Financing proceeds	$	29.2	$	39.8
Capping, closure and post-closure obligations		53.5		61.8
Self-insurance		70.5		63.8
Other		6.9		7.4
Total restricted cash and marketable securities	$	160.1	$	172.8