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Summary of Significant Accounting Policies - Goodwill (Details) $ in Millions	9 Months Ended
	Sep. 30, 2024 USD ($)
Goodwill [Roll Forward]
Balance beginning of period	$ 5,079
Impairment	(15)
Sale of Airtron	(44)
Foreign currency translation adjustments	(2)
Balance end of period	5,018
Texas
Goodwill [Roll Forward]
Balance beginning of period	643
Impairment	0
Sale of Airtron	0
Foreign currency translation adjustments	0
Balance end of period	643
East
Goodwill [Roll Forward]
Balance beginning of period	721
Impairment	0
Sale of Airtron	0
Foreign currency translation adjustments	0
Balance end of period	721
West/Services/Other
Goodwill [Roll Forward]
Balance beginning of period	221
Impairment	(15)
Sale of Airtron	(44)
Foreign currency translation adjustments	(2)
Balance end of period	160
Vivint Smart Home
Goodwill [Roll Forward]
Balance beginning of period	3,494
Impairment	0
Sale of Airtron	0
Foreign currency translation adjustments	0
Balance end of period	$ 3,494

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