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Equipment Installment Plans (Tables)

12 Months Ended

Dec. 31, 2020

Receivables [Abstract]

Equipment installment plan receivables

The following table summarizes equipment installment plan receivables as of December 31, 2020 and 2019.

December 31,			2020						2019
(Dollars in millions)
Equipment installment plan receivables, gross			$	1,007					$	1,008
Allowance for credit losses			(78)						(84)
Equipment installment plan receivables, net			$	929					$	924
Net balance presented in the Consolidated Balance Sheet as:
Accounts receivable — Customers and agents (Current portion)			$	590					$	587
Other assets and deferred charges (Non-current portion)			339						337
Equipment installment plan receivables, net			$	929					$	924

Equipment installment plan receivables credit categories

The balance and aging of the equipment installment plan receivables on a gross basis by credit category were as follows:

			December 31, 2020																														December 31, 2019
			Lowest Risk						Lower Risk						Slight Risk						Higher Risk						Total						Lowest Risk						Lower Risk						Slight Risk						Higher Risk						Total
(Dollars in millions)
Unbilled			$	819					$	98					$	22					$	9					$	948					$	812					$	99					$	23					$	8					$	942
Billed — current			36						5						1						1						43						37						5						2						1						45
Billed — past due			8						5						2						1						16						11						6						3						1						21
Total			$	863					$	108					$	25					$	11					$	1,007					$	860					$	110					$	28					$	10					$	1,008

The balance of the equipment installment plan receivables as of December 31, 2020 on a gross basis by year of origination were as follows:

			2018						2019						2020						Total
(Dollars in millions)
Lowest Risk			$	42					$	270					$	551					$	863
Lower Risk			3						28						77						108
Slight Risk			1						6						18						25
Higher Risk			—						2						9						11
Total			$	46					$	306					$	655					$	1,007

Equipment installment plans allowance for credit losses

Activity for the years ended December 31, 2020 and December 31, 2019, in the allowance for credit losses for equipment installment plan receivables was as follows:

			2020						2019
(Dollars in millions)
Allowance for credit losses, beginning of year			$	84					$	77
Bad debts expense			50						82
Write-offs, net of recoveries			(56)						(75)
Allowance for credit losses, end of year			$	78					$	84

X

- Definition

Tabular disclosure of allowance for credit loss on financing receivable.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 11B
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953423-111524

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919249-210447

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- Definition

Tabular disclosure of financing receivables by credit quality indicator. The credit quality indicator is a statistic about the credit quality of financing receivables. Examples include, but not limited to, consumer credit risk scores, credit-rating-agency ratings, an entity's internal credit risk grades, loan-to-value ratios, collateral, collection experience and other internal metrics.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919230-210447

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 29
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953659-111524

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Tabular disclosure of the various types of trade accounts and notes receivable and for each the gross carrying value, allowance, and net carrying value as of the balance sheet date. Presentation is categorized by current, noncurrent and unclassified receivables.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.3,4)
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