Business Restructuring (Tables)

12 Months Ended

Dec. 31, 2018

Restructuring and Related Activities [Abstract]

Activity Related to Restructuring Reserves

Restructuring Reserve Activity
($ in millions)	Total Reserve
December 31, 2016		$130
2017 Activity	3
Cash payments	(49		)
Foreign currency impact	18
December 31, 2017		$102
Total 2018 restructuring charge	83
Additional actions approved	32
Release of prior reserves and other adjustments (1)	(49		)
Cash payments	(66		)
Foreign currency impact	(4		)
Other	12
December 31, 2018		$110