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Property, Plant and Equipment, Net (Tables)
3 Months Ended
Mar. 31, 2021
Property, Plant and Equipment, Net.  
Schedule of property, plant and equipment

March 31,

December 31,

($ in millions)

    

2021

    

2020

Land

$

161

$

163

Buildings

1,708

1,653

Machinery and equipment

6,338

6,214

Construction-in-progress

990

883

9,197

8,913

Accumulated depreciation

(3,627)

(3,562)

$

5,570

$

5,351