Supplementary Information (Tables)

12 Months Ended

Dec. 31, 2020

Segment Reporting [Abstract]

Cash Paid (Refunded) for Interest and Income Taxes

Cash paid for interest and income taxes was as follows:  

(Stated in millions)
	2020		2019		2018
Interest	$	598	$	558	$	592
Income tax	$	582	$	739	$	628

Interest and Other Income

Interest and other income includes the following:

(Stated in millions)
	2020		2019		2018
Earnings of equity method investments	$	91	$	45	$	89
Interest income		33		41		60
Unrealized gain on marketable securities (see Note 3)		39		-		-
	$	163	$	86	$	149

Change in Allowance for Doubtful Accounts

The change in Allowance for doubtful accounts is as follows:

(Stated in millions)
	2020			2019		2018
Balance at beginning of year	$	255		$	249	$	241
Additions		58			5		15
Amounts written off		(12	)		1		(7	)
Balance at end of year	$	301		$	255	$	249

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, 2020 and 2019.  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)
	2020		2019
Trade	$	2,937	$	4,790
Payroll, vacation and employee benefits		1,524		1,445
Billings and cash collections in excess of revenue		941		910
Other		3,040		3,518
	$	8,442	$	10,663