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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
 
December 31,
(In millions)
2019
 
2018
United States
$
16,427

 
$
16,011

International(a)
493

 
710

Not allocated to segments
80

 
83

Net property, plant and equipment
$
17,000

 
$
16,804


(a)
The International decrease is due to dispositions of our non-operated interest in the Atrush block in Kurdistan and our U.K. business during 2019 (see Note 5).
At December 31, 2019, 2018 and 2017 we had total deferred exploratory well costs as follows:
 
December 31,
(In millions)
2019
 
2018
 
2017
Amounts capitalized less than one year after completion of drilling
$
278

 
$
297

 
$
263

Amounts capitalized greater than one year after completion of drilling
—

 
—

 
32

Total deferred exploratory well costs
$
278

 
$
297

 
$
295

Number of projects with costs capitalized greater than one year after
completion of drilling
—

 
—

 
1

 
 
 
 
 
 
(In millions)
2019
 
2018
 
2017
Beginning balance
$
297

 
$
295

 
$
249

Additions
218

 
262

 
212

Charges to expense(a)
(5
)
 
(35
)
 
(64
)
Transfers to development
(230
)
 
(197
)
 
(102
)
Dispositions(b)
(2
)
 
(28
)
 
—

Ending balance
$
278

 
$
297

 
$
295


(a) 
2018 includes $32 million related to the Rodo well in Alba Block Sub Area B, offshore E.G. 2017 includes $64 million as a result of our agreement to sell Diaba License G4-223 in the Republic of Gabon (see Note 11 for further detail).
(b) 
2018 includes the sale of our Libya subsidiary.
We had no exploratory well costs capitalized greater than one year as of December 31, 2019 and December 31, 2018.