Business Restructuring (Tables)

3 Months Ended

Mar. 31, 2018

Restructuring and Related Activities [Abstract]

Restructuring and Related Costs [Table Text Block]

The following table summarizes the reserve activity for the three months ended March 31, 2018:

($ in millions, except for employees impacted)	Severance and Other Costs			Employees Impacted
December 31, 2017		$102		949
2018 Activity	(17		)	(151	)
Foreign currency	2
March 31, 2018		$87		798