Postretirement Benefits (Components Of Postretirement Benefit Expense) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013		Dec. 31, 2012
U.S. Postretirement Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1	$ 2		$ 3
Interest cost	14	14		20
Amortization of Gains (Losses)	5	7		10
Amortization of prior service credits	(13)	(24)		(30)
Recognized Net Gain (Loss) Due to Curtailments	0	0		(7)
Net periodic pension expense (a)	7	(1)	[1]	(4)
Foreign Postretirement Benefit Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	2		0
Interest cost	6	5		1
Amortization of Gains (Losses)	1	0		0
Amortization of prior service credits	(1)	0		0
Recognized Net Gain (Loss) Due to Curtailments	0	0		0
Net periodic pension expense (a)	$ 7	$ 7		$ 1

[1] Excludes $7 million of curtailment gains in 2013 related to the sale of Building Products that were recorded in Net (gains) losses on sales and impairments of businesses in the consolidated statement of operations.