Other Financial Statement Items (Tables)

9 Months Ended

Sep. 30, 2020

Balance Sheet Related Disclosures [Abstract]

Schedule of Accounts, Notes, Loans and Financing Receivable

Accounts receivable and unbilled revenues, net as of September 30, 2020 and December 31, 2019 consisted of:

As of	September 30, 2020		December 31, 2019
(Millions)
Trade receivables and unbilled revenues	$	1,115	$	1,151
Allowance for credit losses	(94)		(69)
Accounts receivable and unbilled revenues, net	$	1,021	$	1,082

Schedule of Accounts Receivable, Allowance for Credit Loss

The change in the allowance for credit losses for the three and nine months ended September 30, 2020 and 2019 consisted of:

	Three Months Ended September 30,				Nine Months Ended September 30,
(Millions)	2020		2019		2020		2019
As of Beginning of Period,	$	85	$	73	$	69	$	62
Current period provision	19		24		60		71
Write-off as uncollectible	(10)		(24)		(35)		(60)
As of September 30,	$	94	$	73	$	94	$	73

Schedule of Accumulated Depreciation and Amortization

The accumulated depreciation and amortization as of September 30, 2020 and December 31, 2019, respectively, were as follows:

	September 30,		December 31,
As of	2020		2019
(Millions)
Property, plant and equipment
Accumulated depreciation	$	9,713	$	9,059
Intangible assets
Accumulated amortization	$	315	$	305