Supplementary Information (Tables)

12 Months Ended

Dec. 31, 2019

Segment Reporting [Abstract]

Cash Paid (Refunded) for Interest and Income Taxes

Cash paid (refunded) for interest and income taxes was as follows:  

(Stated in millions)
	2019		2018		2017
Interest	$	558	$	592	$	572
Income tax	$	739	$	628	$	(44	)

Interest and Other Income

Interest and other income includes the following:

(Stated in millions)
	2019		2018		2017
Interest income	$	41	$	60	$	128
Earnings of equity method investments		45		89		96
	$	86	$	149	$	224

Change in Allowance for Doubtful Accounts

The change in Allowance for doubtful accounts is as follows:

(Stated in millions)
	2019		2018			2017
Balance at beginning of year	$	249	$	241		$	397
Additions		5		15			7
Amounts written off		1		(7	)		(163	)
Balance at end of year	$	255	$	249		$	241

Accounts Payable and Accrued Liabilities

Revenue in excess of billings related to contracts where revenue is recognized over time was $0.2 billion  at both December 31, 2019 and 2018.  Such amounts are included within Receivables less allowance for doubtful accounts in the Consolidated Balance Sheet.

Accounts payable and accrued liabilities consist of the following:

(Stated in millions)
	2019		2018
Trade	$	4,790	$	4,709
Payroll, vacation and employee benefits		1,293		1,244
Billings and cash collections in excess of revenue		910		877
Other		3,670		3,393
	$	10,663	$	10,223