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Summary of Significant Accounting Policies - Activity in the Allowance for Credit Losses (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	$ 121	$ 666	$ 133	$ 683
Acquired balance from Vivint Smart Home	0	0	22	0
Provision for credit losses	45	26	80	51
Write-offs	(66)	(71)	(144)	(121)
Recoveries collected	12	6	21	14
Other	8	0	8	0
Ending balance	$ 120	$ 627	$ 120	$ 627

X

- Definition

Accounts Receivable, Allowance for Credit Loss Acquired in Acquisition

+ References

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- Definition

Amount of allowance for credit loss on accounts receivable.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Amount of increase in allowance for credit loss on accounts receivable, from recovery.

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Amount of direct write-downs of accounts receivable charged against the allowance.

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Amount of expense (reversal of expense) for expected credit loss on accounts receivable.

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