Revenue

6 Months Ended

Jun. 30, 2021

Revenues [Abstract]

Revenue

REVENUE

Our revenues are derived primarily from sales to customers in North America and Internationally, principally Europe. Net sales from these geographic markets, by segment, were as follows, in millions:

	Three Months Ended June 30, 2021
	Plumbing Products		Decorative Architectural Products		Total
Primary geographic markets:
North America	$	867	$	850	$	1,717
International, principally Europe	462		—		462
Total	$	1,329	$	850	$	2,179

	Six Months Ended June 30, 2021
	Plumbing Products		Decorative Architectural Products		Total
Primary geographic markets:
North America	$	1,675	$	1,571	$	3,246
International, principally Europe	903		—		903
Total	$	2,578	$	1,571	$	4,149

	Three Months Ended June 30, 2020
	Plumbing Products		Decorative Architectural Products		Total
Primary geographic markets:
North America	$	584	$	896	$	1,480
International, principally Europe	284		—		284
Total	$	868	$	896	$	1,764

	Six Months Ended June 30, 2020
	Plumbing Products		Decorative Architectural Products		Total
Primary geographic markets:
North America	$	1,216	$	1,522	$	2,738
International, principally Europe	607		—		607
Total	$	1,823	$	1,522	$	3,345

Our contract asset balance was $1 million and $2 million at June 30, 2021 and December 31, 2020, respectively. Our contract liability balance was $24 million and $62 million at June 30, 2021 and December 31, 2020, respectively.

We reversed $1 million and $3 million of revenue for the three months ended June 30, 2021 and 2020, respectively, related to performance obligations settled in previous quarters of the same year. We recognized $3 million and $4 million of revenue for the three and six months ended June 30, 2021, respectively, and $2 million and $5 million of revenue for the three and six months ended June 30, 2020, respectively, related to performance obligations settled in previous years.

D. REVENUE (Concluded)

Changes in the allowance for credit losses deducted from accounts receivable were as follows, in millions: 

	Six Months Ended June 30, 2021		Twelve Months Ended December 31, 2020
Balance at January 1	$	7	$	5
Provision for expected credit losses during the period	1		3
Write-offs charged against the allowance	(1)		(2)
Recoveries of amounts previously written off	1		1
Other (A)	(1)		—
Balance at end of period	$	7	$	7

(A)    As a result of Hüppe being divested in May 2021, $1 million for the six months ended June 30, 2021 was removed from allowance for credit losses.