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Summary of Significant Accounting Policies - Goodwill (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Sep. 30, 2022
Goodwill [Roll Forward]
Balance beginning of period			$ 1,795
Impairment	$ (130)		(130)
Asset sales			(6)
Foreign Currency Translation			9
Balance end of period			1,650
Texas
Goodwill [Roll Forward]
Balance beginning of period			751
Impairment			0
Asset sales			(6)
Foreign Currency Translation			0
Balance end of period			745
East
Goodwill [Roll Forward]
Balance beginning of period			853
Impairment		$ (35)	(130)
Asset sales			0
Foreign Currency Translation			0
Balance end of period			723
West/Services/Other
Goodwill [Roll Forward]
Balance beginning of period			191
Impairment			0
Asset sales			0
Foreign Currency Translation			9
Balance end of period			$ 182

X

- Definition

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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- Definition

Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

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