Segments

During the fourth quarter of 2017, as part of the realignment of our operating structure, we changed the composition of our reportable segments, effective for the quarter ended December 31, 2017. See Note 1, Organization, Consolidation and Presentation of Financial Statements, for additional information regarding our five reportable segments. See Note 3, Equity Method Investments, for segment results for UBBP. Segment results for our U.S. Wallboard and Surfaces, U.S. Performance Materials, U.S. Ceilings and Canada segments were as follows:



	Three months ended September 30,						Nine months ended September 30,
(millions)	2018			2017			2018			2017
Net Sales:
U.S. Wallboard and Surfaces	$	487		$	466		$	1,440		$	1,417
U.S. Performance Materials	101			92			298			278
U.S. Ceilings	143			125			420			355
Canada	110			100			342			300
Other	66			63			191			178
Eliminations	(56		)	(51		)	(174		)	(155		)
Total	$	851		$	795		$	2,517		$	2,373

Operating Profit (Loss):
U.S. Wallboard and Surfaces	$	64		$	71		$	194		$	228
U.S. Performance Materials	(1		)	6			(6		)	20
U.S. Ceilings	24			25			66			68
Canada	6			3			16			7
Other	4			6			12			8
Corporate	(28		)	(20		)	(92		)	(61		)
Total	$	69		$	91		$	190		$	270

Net sales disaggregated by product type were as follows:



	Three months ended September 30, 2018
(millions)	U.S. Wallboard and Surfaces			U.S. Performance Materials			U.S. Ceilings			Canada			Other		Total
Wallboard	$	253		$	—		$	—		$	65		$	20	$	338
Surfaces and industrial products	145			—			—			21			7		173
Underlayment	—			69			—			3			11		83
Building envelope and structural	—			21			—			—			—		21
Ceiling tile and grid	—			—			122			10			8		140
Specialty ceilings	—			—			15			3			—		18
Other products	25			—			1			2			18		46
Total product sales	423			90			138			104			64		819
Other miscellaneous sales ^(a)	64			11			5			6			2		88
Total sales before eliminations	487			101			143			110			66		907
Eliminations	(31		)	(6		)	(11		)	(8		)	—		(56		)
Total net sales	$	456		$	95		$	132		$	102		$	66	$	851



	Nine months ended September 30, 2018
(millions)	U.S. Wallboard and Surfaces			U.S. Performance Materials			U.S. Ceilings			Canada			Other		Total
Wallboard	$	743		$	—		$	—		$	196		$	57	$	996
Surfaces and industrial products	441			—			—			67			21		529
Underlayment	—			204			—			8			31		243
Building envelope and structural	—			62			—			1			1		64
Ceiling tile and grid	—			—			359			34			25		418
Specialty ceilings	—			—			48			7			—		55
Other products	75			—			1			10			51		137
Total product sales	1,259			266			408			323			186		2,442
Other miscellaneous sales ^(a)	181			32			12			19			5		249
Total sales before eliminations	1,440			298			420			342			191		2,691
Eliminations	(92		)	(19		)	(38		)	(25		)	—		(174		)
Total net sales	$	1,348		$	279		$	382		$	317		$	191	$	2,517


(a)	Other miscellaneous sales primarily includes shipping and handling costs billed to customers.