Segments (Tables)

6 Months Ended

Jun. 30, 2017

Segment Reporting [Abstract]

Net sales and operating profit (loss) by segment

Segment results for our Gypsum and Ceilings segments were as follows:

	Three months ended June 30,						Six months ended June 30,
(millions)	2017			2016			2017			2016
Net Sales:
Gypsum	$	688		$	636		$	1,337		$	1,264
Ceilings	126			135			246			256
Eliminations	(3		)	(2		)	(5		)	(4		)
Total	$	811		$	769		$	1,578		$	1,516
Operating Profit (Loss):
Gypsum	$	90		$	112		$	181		$	221
Ceilings	23			32			46			60
Corporate	(17		)	(22		)	(40		)	(43		)
Total	$	96		$	122		$	187		$	238