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Property, Plant & Equipment - Net (Tables)
 12 Months Ended
Dec. 31, 2018
Property, Plant and Equipment [Abstract]  
Property, Plant & Equipment - Net
The fair value of property, plant and equipment was primarily calculated using replacement costs adjusted for the age and condition of the asset, and is summarized below:
Property, plant and equipment ("PP&E")
(in millions)
Production plants
$
10,739

Storage tanks
1,809

Transportation equipment and other
574

Cylinders
2,493

Buildings
1,970

Land and improvements
647

Construction in progress
1,149

Preliminary fair value of PP&E
$
19,381


Significant classes of property, plant and equipment are as follows (2018 reflects the impact of the Linde AG merger on October 31, 2018 (see Notes 1 and 3) and the divestiture of Praxair's European industrial gases business on December 3, 2018 (see Notes 1, 3 and 4)): 
(Millions of dollars)
December 31,
 
Depreciable Lives (Yrs)
 
2018
 
2017
Production plants (primarily 15-year life) (a)
 
10-20
 
$
24,726

 
$
16,258

Storage tanks
 
15-20
 
4,061

 
2,620

Transportation equipment and other (b)
 
3-15
 
2,654

 
1,588

Cylinders
 
10-30
 
3,955

 
1,875

Buildings
 
25-40
 
3,083

 
1,202

Land and improvements (c)
 
0-20
 
1,162

 
589

Construction in progress
 
 
 
2,296

 
1,159

 
 
 
 
41,937

 
25,291

Less: accumulated depreciation
 
 
 
(12,220
)
 
(13,466
)
 
 
 
 
$
29,717

 
$
11,825


(a) - Depreciable lives of production plants related to long-term customer supply contracts are consistent with the contract lives.
(b) - Capitalized software was previously reported in the transportation equipment and other line. At December 31, 2018, capitalized software balances were reported within other intangibles - net (see Note 12). Prior period amounts have been reclassified to conform to current year presentation (see Note 2).
(c) - Land is not depreciated.
Schedule of Capital Leased Assets
The gross amount of assets recorded under capital leases by major class are as follows:
(Millions of dollars)
December 31,
 
2018
 
2017
Production plants
 
$
1

 
$
2

Transportation equipment and other
 
49

 
1

Buildings
 
24

 
—

 
 
$
74

 
$
3