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Business Restructuring (Tables)
6 Months Ended
Jun. 30, 2019
Restructuring and Related Activities [Abstract]  
Restructuring and Related Costs
The following table summarizes the reserve activity for the six months ended June 30, 2019:
($ in millions)
Total Reserve
December 31, 2018

$110

Second quarter 2019 restructuring charge
184

Cash payments
(23
)
Release of prior reserves 
(11
)
Foreign currency impact
1

June 30, 2019

$261