XML 57 R14.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
PROPERTY, PLANT AND EQUIPMENT (Notes)
 12 Months Ended
Dec. 31, 2019
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT PROPERTY, PLANT AND EQUIPMENT

The following table sets forth our property, plant and equipment by property type, for the periods indicated:
 
 
Estimated Useful
Lives (Years)
 
December 31,
2019
 
December 31,
2018
 
 
 
 
(Thousands of dollars)
Nonregulated
 
 
 
 
 
 
Gathering pipelines and related equipment
 
5 to 40
 
$
4,316,936

 
$
3,851,043

Processing and fractionation and related equipment
 
3 to 40
 
4,439,332

 
4,171,072

Storage and related equipment
 
3 to 54
 
684,635

 
656,455

Transmission pipelines and related equipment
 
5 to 54
 
797,678

 
782,258

General plant and other
 
2 to 60
 
610,013

 
547,424

Construction work in process
 
—
 
1,645,663

 
797,182

Regulated
 
 
 


 
 
Storage and related equipment
 
5 to 25
 
9,180

 
8,987

Natural gas transmission pipelines and related equipment
 
5 to 77
 
1,552,546

 
1,475,789

NGL transmission pipelines and related equipment
 
5 to 88
 
6,126,056

 
4,677,599

General plant and other
 
2 to 50
 
66,507

 
61,136

Construction work in process
 
—
 
1,802,946

 
1,002,018

Property, plant and equipment
 
 
 
22,051,492

 
18,030,963

Accumulated depreciation and amortization - nonregulated
 
 
 
(2,471,649
)
 
(2,168,855
)
Accumulated depreciation and amortization - regulated
 
 
 
(1,231,158
)
 
(1,095,457
)
Net property, plant and equipment
 
 
 
$
18,348,685

 
$
14,766,651



The average depreciation rates for our regulated property are set forth, by segment, in the following table for the periods indicated:
 
 
Years Ended December 31,
 
 
2019
 
2018
 
2017
Natural Gas Liquids
 
2.0%
 
1.9%
 
1.9%
Natural Gas Pipelines
 
2.1%
 
2.1%
 
2.1%


We incurred costs for construction work in process that had not been paid at December 31, 2019, 2018 and 2017, of $544.8 million, $388.3 million and $92.4 million, respectively. Such amounts are not included in capital expenditures (less AFUDC and capitalized interest) on the Consolidated Statements of Cash Flows.

Impairment Charges - In 2017, following a review of nonstrategic assets for potential divestiture, we recorded $16.0 million of noncash impairment charges related to certain nonstrategic gathering and processing assets located in North Dakota.