Statement of Comprehensive Income Statement - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	$ (118)	$ (352)	$ (242)
Foreign currency translation (loss) gain, net of tax	26	(99)	127
Pension and post-retirement (loss) gain, net of tax	(7)	(1)	3
Derivative financial instruments unrealized (loss) gain, net of tax	(11)	0	4
Total other comprehensive income (loss)	8	(100)	134
Total comprehensive loss	(110)	(452)	(108)
Less: comprehensive income attributable to noncontrolling interest	(12)	0	0
Comprehensive (loss) income attributable to SGC	$ (122)	$ (452)	$ (108)