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Property, Plant and Equipment
 12 Months Ended
Dec. 31, 2019
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment Property, Plant and Equipment
($ in millions)
Useful Lives (years)
 
2019

 
2018

Land and land improvements
1-30
 

$511

 

$489

Buildings
20-40
 
1,573

 
1,472

Machinery and equipment
5-25
 
3,575

 
3,387

Other
3-20
 
1,092

 
989

Construction in progress
 
 
314

 
296

Total(1)
 
 

$7,065

 

$6,633

Less: accumulated depreciation
 
 
4,082

 
3,828

Net
 
 

$2,983

 

$2,805

(1)
Interest capitalized in 2019, 2018 and 2017 was $6 million, $4 million and $7 million, respectively.