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Information Relating to the Consolidated Statement of Cash Flows (Tables)
 9 Months Ended
Sep. 30, 2017
Supplemental Cash Flow Elements [Abstract]  
Net increase in operating working capital
The “Net increase in operating working capital” was composed of the following operating changes:
 
Nine Months Ended
September 30
 
2017
 
2016
 
(Millions of dollars)
Decrease (increase) in accounts and notes receivable
$
265

 
$
(455
)
(Increase) decrease in inventories
(436
)
 
232

Decrease in prepaid expenses and other current assets
196

 
844

Decrease in accounts payable and accrued liabilities
(729
)
 
(1,783
)
Increase (decrease) in income and other taxes payable
9

 
(104
)
Net increase in operating working capital
$
(695
)
 
$
(1,266
)
Cash payment for interest on debt and for income taxes
“Net Cash Provided by Operating Activities” included the following cash payments for interest on debt and for income taxes:
 
Nine Months Ended
September 30
 
2017
 
2016
 
(Millions of dollars)
Interest on debt (net of capitalized interest)
$
30

 
$
28

Income taxes
2,203

 
1,492
Net sales of marketable securities
The “Net sales of marketable securities” consisted of the following gross amounts:
 
Nine Months Ended
September 30
 
2017
 
2016
 
(Millions of dollars)
Marketable securities purchased
$
(3
)
 
$
(9
)
Marketable securities sold
3

 
11

Net sales of marketable securities
$
—

 
$
2
Schedule of net borrowing of loans by equity affiliates
The “Net borrowing of loans by equity affiliates” consisted of the following gross amounts:
 
Nine Months Ended
September 30
 
2017
 
2016
 
(Millions of dollars)
Borrowing of loans by equity affiliates
$
(142
)
 
$
(2,271
)
Repayment of loans by equity affiliates
106

 
76

Net borrowing of loans by equity affiliates
$
(36
)
 
$
(2,195
)
Schedule of other short term investments
The “Net (purchases) sales of other short-term investments” consisted of the following gross amounts:
 
Nine Months Ended
September 30
 
2017
 
2016
 
(Millions of dollars)
Purchases of other short-term investments
$
(26
)
 
$
—

Sales of other short-term investments
7

 
155

Net (purchases) sales of other short-term investments
$
(19
)
 
$
155
Schedule of short-term debt
The “Net (repayments) borrowings of short-term obligations" consisted of the following gross and net amounts:
 
Nine Months Ended
September 30
 
2017
 
2016
 
(Millions of dollars)
Repayments of short-term obligations
$
(8,403
)
 
$
(8,415
)
Proceeds from issuances of short-term obligations
3,415

 
11,695

Net borrowings of short-term obligations with three months or less maturity
(2,197
)
 
(2,411
)
Net (repayments) borrowings of short-term obligations
$
(7,185
)
 
$
869
Capital expenditures
The major components of “Capital expenditures” and the reconciliation of this amount to the capital and exploratory expenditures, including equity affiliates, are as follows:
 
Nine Months Ended
September 30
 
2017
 
2016
 
(Millions of dollars)
Additions to properties, plant and equipment
$
9,615

 
$
13,757

Additions to investments
16

 
38

Current year dry hole expenditures
131

 
305

Payments for other liabilities and assets, net
1

 
—

 Capital expenditures
9,763

 
14,100

Expensed exploration expenditures
368

 
370

Assets acquired through capital lease obligations
3

 
4

 Capital and exploratory expenditures, excluding equity affiliates
10,134

 
14,474

Company’s share of expenditures by equity affiliates
3,252

 
2,693

 Capital and exploratory expenditures, including equity affiliates
$
13,386

 
$
17,167