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Subsequent Events - Narrative (Details) - USD ($)				1 Months Ended
	Aug. 11, 2021	Jul. 06, 2021	May 26, 2021	Jul. 31, 2021	Jul. 29, 2021	Jul. 01, 2021
Class C Capital Stock
Subsequent Event [Line Items]
Settlement of convertible senior notes (in shares)			4,800,000
2023 Notes | Convertible senior notes
Subsequent Event [Line Items]
Debt instrument, notice for redemption of convertible debt, amount			$ 372,800,000
Subsequent Event | Goldman Sachs Bank USA
Subsequent Event [Line Items]
Maximum borrowing capacity					$ 750,000,000.0
Subsequent Event | Class C Capital Stock
Subsequent Event [Line Items]
Settlement of convertible senior notes (in shares)				4,700,000
Subsequent Event | Revolving Single-Family Homes Notes | Secured Debt | Forecast
Subsequent Event [Line Items]
Proceeds from issuance of long-term debt	$ 450,000,000.0
Long-term debt, term	30 months
Long term debt, reinvestment period	24 months
Weighted average interest rate	2.43%
Subsequent Event | 2023 Notes | Convertible senior notes
Subsequent Event [Line Items]
Debt instrument, repurchased face amount		$ 1,300,000				$ 366,400,000
Cash paid for repurchase		$ 1,300,000

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