Restructuring and Other Termination Costs (Tables)

6 Months Ended

Jun. 30, 2018

Restructuring and Related Activities [Abstract]

Summary of restructuring liabilities

The following table summarizes our restructuring liabilities:

	Other Current Liabilities
	($ in millions)
Balance as of December 31, 2017	$	—
Initial restructuring recognition on January 30, 2018	38
Termination benefits paid	(38		)
Balance as of June 30, 2018	$	—