
9.	Segment and Related Information

We currently manage and evaluate our operations primarily through our Eastern, Midwest, Southern, Western and Wheelabrator Groups. These five Groups are presented below as our reportable segments. Our four geographic operating Groups provide collection, transfer, disposal (in both solid waste and hazardous waste landfills) and recycling services. Our fifth Group is the Wheelabrator Group, which provides waste-to-energy services and manages waste-to-energy facilities and independent power production plants. We serve residential, commercial, industrial, and municipal customers throughout North America. The operations not managed through our five operating Groups, including the Oakleaf operations we acquired on July 28, 2011, are presented herein as “Other.” See Note 10 for additional information related to our acquisition of Oakleaf.

Summarized financial information concerning our reportable segments for the three and nine months ended September 30 is shown in the following table (in millions):


	Gross		Intercompany			Net
	Operating		Operating			Operating		Income from
	Revenues		Revenues			Revenues		Operations

Three Months Ended:
September 30, 2011
Eastern	$	822	$	(139	)	$	683	$	146
Midwest		847		(123	)		724		175
Southern		853		(104	)		749		194
Western		841		(114	)		727		154
Wheelabrator		228		(28	)		200		57
Other		462		(23	)		439		(40	)

		4,053		(531	)		3,522		686
Corporate and Other		—		—			—		(143	)

Total	$	4,053	$	(531	)	$	3,522	$	543

September 30, 2010
Eastern	$	755	$	(132	)	$	623	$	138
Midwest		792		(119	)		673		149
Southern		903		(102	)		801		218
Western		809		(113	)		696		146
Wheelabrator		237		(32	)		205		67
Other		248		(11	)		237		(38	)

		3,744		(509	)		3,235		680
Corporate and Other		—		—			—		(136	)

Total	$	3,744	$	(509	)	$	3,235	$	544

Nine Months Ended:
September 30, 2011
Eastern	$	2,326	$	(387	)	$	1,939	$	407
Midwest		2,403		(355	)		2,048		460
Southern		2,553		(307	)		2,246		579
Western		2,456		(336	)		2,120		436
Wheelabrator		664		(89	)		575		112
Other		1,085		(41	)		1,044		(75	)

		11,487		(1,515	)		9,972		1,919
Corporate and Other		—		—			—		(443	)

Total	$	11,487	$	(1,515	)	$	9,972	$	1,476

September 30, 2010
Eastern	$	2,214	$	(385	)	$	1,829	$	390
Midwest		2,266		(336	)		1,930		372
Southern		2,602		(303	)		2,299		624
Western		2,372		(328	)		2,044		416
Wheelabrator		660		(92	)		568		150
Other		688		(30	)		658		(93	)

		10,802		(1,474	)		9,328		1,859
Corporate and Other		—		—			—		(317	)

Total	$	10,802	$	(1,474	)	$	9,328	$	1,542

Fluctuations in our operating results may be caused by many factors, including period-to-period changes in the relative contribution of revenue by each line of business and operating segment and by general economic conditions. In addition, our revenues and income from operations typically reflect seasonal patterns. Our operating revenues normally tend to be somewhat higher in the summer months, primarily due to the traditional seasonal increase in the volume of construction and demolition waste. Historically, the volumes of industrial and residential waste in certain regions in which we operate have tended to increase during the summer months. Our second and third quarter revenues and results of operations typically reflect these seasonal trends.

Additionally, certain destructive weather conditions that tend to occur during the second half of the year, such as hurricanes that most often impact our Southern Group, can actually increase our revenues in the areas affected. While weather-related and other “one-time” occurrences can boost revenues through additional work, as a result of significant start-up costs and other factors, such revenue sometimes generates earnings at comparatively lower margins. Certain weather conditions, including severe winter storms, may result in the temporary suspension of our operations, which can significantly affect the operating results of the affected regions. The operating results of our first quarter also often reflect higher repair and maintenance expenses because we rely on the slower winter months, when waste flows are generally lower, to perform scheduled maintenance at our waste-to-energy facilities.

From time to time, the operating results of our reportable segments are significantly affected by unusual or infrequent transactions or events. During 2010, our Midwest Group recognized $26 million in charges, largely in the first quarter, as a result of bargaining unit employees in Michigan and Ohio agreeing to our proposal to withdraw them from an underfunded multiemployer pension plan. Refer to Note 8 for additional information related to our participation in multiemployer pension plans.