Revenue Recognition (Tables)

3 Months Ended

Mar. 31, 2021

Revenue Recognition

Schedule of disaggregation of revenue

(Dollars in millions)
For the three months ended March 31:	2021		2020
Cloud & Data Platforms	$	2,866	$	2,536
Cognitive Applications		1,233		1,182
Transaction Processing Platforms		1,338		1,520
Total Cloud & Cognitive Software	$	5,437	$	5,238
Consulting		2,189		2,071
Application Management		1,770		1,840
Global Process Services		274		225
Total Global Business Services	$	4,234	$	4,136
Infrastructure & Cloud Services		4,853		4,916
Technology Support Services		1,517		1,550
Total Global Technology Services	$	6,370	$	6,467
Systems Hardware		1,114		997
Operating Systems Software		313		371
Total Systems	$	1,427	$	1,368
Global Financing*		240		299
Other		23		62
Total revenue	$	17,730	$	17,571

* Contains lease and loan/working capital financing arrangements which are not subject to the guidance on revenue from contracts with customers.

Schedule of disaggregation of revenue by geography

(Dollars in millions)
For the three months ended March 31:	2021		2020
Americas	$	8,179	$	8,166
Europe/Middle East/Africa		5,641		5,517
Asia Pacific		3,909		3,888
Total	$	17,730	$	17,571

Schedule of reconciliation of contract balances

	At March 31,		At December 31,
(Dollars in millions)	2021		2020
Notes and accounts receivable–trade (net of allowances of $345 in 2021 and $351 in 2020)	$	6,458	$	7,132
Contract assets*		522		497
Deferred income (current)		14,197		12,833
Deferred income (noncurrent)		4,153		4,301

* Included within prepaid expenses and other current assets in the Consolidated Balance Sheet.

Schedule of notes and accounts receivable - trade allowance for credit losses

(Dollars in millions)
January 1, 2021		Additions / (Releases)		Write-offs		Other*		March 31, 2021
$	351	$	1	$	(6)	$	(2)	$	345

January 1, 2020		Additions / (Releases)		Write-offs		Other*		December 31, 2020
$	316	$	76	$	(46)	$	5	$	351

* Primarily represents translation adjustments.