Income Taxes (Details Textual) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013
Income Taxes (Textual) [Abstract]
Current Foreign, State And Local Tax Expense (Benefit)	$ 1
Effective settlement of audits of tax years	1
Income tax expense (benefit)	0	2	5	(1)
Federal net operating loss carryforwards	2,009		2,009
Federal alternative minimum tax credit carryforwards	45		45
Minimum taxable income needed to fully realize the U.S. federal net deferred tax assets	2,139		2,139
Foreign tax credit carryforwards	8		8
Deferred tax assets state, net operating loss and tax credit carryforwards	268		268
Gross deferred tax assets operating loss and tax credit carry forwards that will expire in current year	11		11
Deferred tax assets, foreign operating loss and tax credit carryforwards	2		2
Valuation allowance	962		962		995
Additional valuation allowance against deferred tax assets recorded	(33)
Percentage of change in ownership			50.00%
Period of change in ownership			3 years
Long-term tax-exempt rate	3.32%		3.32%
Time period after the change in which amount of the limitation be increased or decreased by built-in gains or losses			5 years
Approximate annual NOL utilization had an ownership change occurred	145		145
Due to Change in Realizability of Deferred Tax Asset for Alternative Minimum Tax Credits [Member]
Income Taxes (Textual) [Abstract]
Additional valuation allowance against deferred tax assets recorded	(11)
Due to Change in Gross Value of Deferred Tax Assets [Member]
Income Taxes (Textual) [Abstract]
Additional valuation allowance against deferred tax assets recorded	(22)
USG Boral Building Products [Member]
Income Taxes (Textual) [Abstract]
Income taxes expense withholding taxes on property contributed to equity method investment			$ 1