Supplemental Cash Flow Information (Tables)
 3 Months Ended
Mar. 31, 2018
Supplemental Cash Flow Elements [Abstract]  
Summary of Supplemental Cash Flow Information
 
Three Months Ended 
 March 31,
(In millions)
2018
 
2017
Net cash provided by operating activities included:
 
 
 
Interest paid (net of amounts capitalized)
$
212

 
$
157

Net income taxes paid to taxing authorities
6

 
4

Non-cash investing and financing activities:
 
 
 
Contribution of assets to joint venture(a)
—

 
328

(a) 
MarkWest’s contribution of assets to Sherwood Midstream and Sherwood Midstream Holdings. See Note 5.

Schedule of Cash and Cash Equivalents
(In millions)
March 31,
2018
 
December 31,
2017
Cash and cash equivalents
$
4,653

 
$
3,011

Restricted cash(a)
4

 
4

Cash, cash equivalents and restricted cash(b)
$
4,657

 
$
3,015

(a) 
The restricted cash balance is included within “Other current assets” on the consolidated balance sheets.
(b) 
As a result of the adoption of ASU 2016-18, the consolidated statements of cash flows now explain the change during the period of both “Cash and cash equivalents” and “Restricted cash.”
Reconciliation of Additions to Property, Plant and Equipment to Total Capital Expenditures
The consolidated statements of cash flows exclude changes to the consolidated balance sheets that did not affect cash. The following is a reconciliation of additions to property, plant and equipment to total capital expenditures:
 
Three Months Ended 
 March 31,
(In millions)
2018
 
2017
Additions to property, plant and equipment per consolidated statements of cash flows
$
755

 
$
610

Asset retirement expenditures
1

 
1

Decrease in capital accruals
(49
)
 
(72
)
Total capital expenditures before acquisitions
707

 
539

Acquisitions(a)
—

 
220

Total capital expenditures
$
707

 
$
759

(a)
The three months ended March 31, 2017 reflects the acquisition of the Ozark pipeline.