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Information Relating to the Consolidated Statement of Cash Flows (Tables)
 9 Months Ended
Sep. 30, 2018
Supplemental Cash Flow Elements [Abstract]  
Net increase in operating working capital
The “Net decrease (increase) in operating working capital” was composed of the following operating changes:
 
Nine Months Ended
September 30
 
2018
 
2017
 
(Millions of dollars)
Decrease (increase) in accounts and notes receivable
$
(1,741
)
 
$
265

Decrease (increase) in inventories
(749
)
 
(436
)
Decrease (increase) in prepaid expenses and other current assets 1
(310
)
 
235

Increase (decrease) in accounts payable and accrued liabilities 1
887

 
(621
)
Increase (decrease) in income and other taxes payable
31

 
9

Net decrease (increase) in operating working capital 1
$
(1,882
)
 
$
(548
)
_____________________
 
 
 
1   2017 amount adjusted to conform to Accounting Standards Update 2016-18.
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
 
2018
 
2017
 
(Millions of dollars)
Interest on debt (net of capitalized interest)
$
502

 
$
30

Income taxes
3,526

 
2,203
Net sales of marketable securities
The “Net sales (purchases) of marketable securities” consisted of the following gross amounts:
 
Nine Months Ended
September 30
 
2018
 
2017
 
(Millions of dollars)
Marketable securities purchased
$
(51
)
 
$
(3
)
Marketable securities sold
—

 
3

Net sales (purchases) of marketable securities
$
(51
)
 
$
—
Schedule of net borrowing of loans by equity affiliates
The “Net repayment (borrowing) of loans by equity affiliates” consisted of the following gross amounts:
 
Nine Months Ended
September 30
 
2018
 
2017
 
(Millions of dollars)
Borrowing of loans by equity affiliates
$
—

 
$
(142
)
Repayment of loans by equity affiliates
78

 
106

Net repayment (borrowing) of loans by equity affiliates
$
78

 
$
(36
)
Schedule of short-term debt
The “Net borrowings (repayments) of short-term obligations" consisted of the following gross and net amounts:
 
Nine Months Ended
September 30
 
2018
 
2017
 
(Millions of dollars)
Repayments of short-term obligations
$
(3,379
)
 
$
(8,403
)
Proceeds from issuances of short-term obligations
2,452

 
3,415

Net borrowings (repayments) of short-term obligations with three months or less maturity
3,126

 
(2,197
)
Net borrowings (repayments) of short-term obligations
$
2,199

 
$
(7,185
)
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
 
2018
 
2017
 
(Millions of dollars)
Additions to properties, plant and equipment
$
9,489

 
$
9,615

Additions to investments
36

 
16

Current year dry hole expenditures
276

 
131

Payments for other liabilities and assets, net
—

 
1

 Capital expenditures
9,801

 
9,763

Expensed exploration expenditures
364

 
368

Assets acquired through capital lease obligations
65

 
3

 Capital and exploratory expenditures, excluding equity affiliates
10,230

 
10,134

Company’s share of expenditures by equity affiliates
4,115

 
3,252

 Capital and exploratory expenditures, including equity affiliates
$
14,345

 
$
13,386
Schedule of cash, cash equivalents and restricted cash
The table below quantifies the beginning and ending balances of restricted cash and restricted cash equivalents in the Consolidated Balance Sheet:
 
 
At September 30
 
At December 31
 
 
2018
 
2017
 
2017
 
2016
 
 
(Millions of dollars)
 
(Millions of dollars)
Cash and Cash Equivalents
 
$
9,686

 
$
6,641

 
$
4,813

 
$
6,988

Restricted cash included in "Prepaid expenses and other current assets"
 
277

 
523

 
405

 
488

Restricted cash included in "Deferred charges and other assets"
 
778

 
791

 
725

 
938

Total Cash, Cash Equivalents and Restricted Cash
 
$
10,741

 
$
7,955

 
$
5,943

 
$
8,414