Accounting Policies - Narrative (Details) - USD ($) $ in Millions	3 Months Ended						6 Months Ended		9 Months Ended	12 Months Ended
	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2018	Jun. 30, 2017	Sep. 30, 2017	Dec. 31, 2017	Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	$ 2,297				$ 2,066		$ 4,217	$ 3,844
Operating Income (Loss)	358		$ 256	$ 309	372	$ 257	602	629	$ 938	$ 1,194	$ 1,087
Other, net	(8)				43		(11)	39
Reclassification from AOCI, Current Period, Tax		$ 59
Accounting Standards Update 2014-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales					9			10		(2)	4
Operating Income (Loss)					7			4		(1)	2
Accounting Standards Update 2017-07
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other, net					8			15		26
Accounting Standards Update 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other, net											32
Operating Segments [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	2,297		1,853	1,945	2,066	1,778	4,217	3,844	5,789	7,642	7,361
Operating Income (Loss)	380		277	331	398	280	642	678	1,009	1,286	1,181
Cabinetry Products [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	268				251		485	482
Cabinetry Products [Member] | Operating Segments [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	268		223	229	251	231	485	482	711	934	970
Operating Income (Loss)	33		25	20	31	16	39	47	67	92	97
Windows and Other Specialty Products [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	191				205		378	384
Windows and Other Specialty Products [Member] | Operating Segments [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net sales	191		182	204	205	179	378	384	588	770	770
Operating Income (Loss)	$ 8		$ 4	$ 24	$ 18	$ 8	$ 12	$ 26	$ 50	$ 54	$ (3)