Stockholders' Equity - Amounts Reclassified from AOCI (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net reclassification from AOCI for cash flow hedges included in cost of products sold	$ (699)	$ (633)	$ (2,042)	$ (1,884)
Net reclassification in AOCI for amortization of prior service cost included in other income, net	4	1	4	5
Net reclassification from AOCI for amortization of prior service cost included in (loss) income from discontinued operations, net of tax	1	0	2	(10)
Less: Income tax benefit on reclassification from AOCI included in income tax expense	(15)	(27)	(37)	(76)
Net income	59	66	154	157
Amounts reclassified from AOCI, net of tax \| Derivatives
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net reclassification from AOCI for cash flow hedges included in cost of products sold	(1)	(1)	(3)	(2)
Less: Income tax benefit on reclassification from AOCI included in income tax expense	0	(1)	0	(1)
Net income	(1)	0	(3)	(1)
Amounts reclassified from AOCI, net of tax \| Defined Benefit Plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net reclassification in AOCI for amortization of prior service cost included in other income, net	(2)	(3)	(6)	(10)
Net reclassification from AOCI for amortization of prior service cost included in (loss) income from discontinued operations, net of tax	0	0	0	(8)
Less: Income tax benefit on reclassification from AOCI included in income tax expense	(1)	(2)	(2)	(5)
Net income	(1)	(1)	(4)	(13)
Amounts reclassified from AOCI, net of tax \| Foreign Currency Translation
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net reclassification from AOCI for amortization of prior service cost included in (loss) income from discontinued operations, net of tax	0	0	(6)	0
Less: Income tax benefit on reclassification from AOCI included in income tax expense	0	0	(2)	0
Net income	$ 0	$ 0	$ (4)	$ 0

USG CORP 10-Q