Other Financial Statement Items (Tables)

3 Months Ended

Mar. 31, 2020

Balance Sheet Related Disclosures [Abstract]

Schedule of Accounts, Notes, Loans and Financing Receivable

Accounts receivable and unbilled revenues, net as of March 31, 2020 and December 31, 2019 consisted of:

As of	March 31, 2020			December 31, 2019
(Millions)
Trade receivables and unbilled revenues	$	1,150		$	1,151
Allowance for credit losses	(73		)	(69		)
Accounts receivable and unbilled revenues, net	$	1,077		$	1,082

Accounts Receivable, Allowance for Credit Loss

The change in the allowance for credit losses for the three months ended March 31, 2020 and 2019 consisted of:

	Three Months Ended March 31,
(Millions)	2020			2019
As of January 1,	$	69		$	62
Current period provision	19			21
Write-off as uncollectible	(15		)	(17		)
As of March 31,	$	73		$	66

Schedule of Accumulated Depreciation and Amortization

The accumulated depreciation and amortization as of March 31, 2020 and December 31, 2019, respectively, were as follows:

	March 31,		December 31,
As of	2020		2019
(Millions)
Property, plant and equipment
Accumulated depreciation	$	9,262	$	9,059
Intangible assets
Accumulated amortization	$	308	$	305