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Debt - Narrative (Detail)		3 Months Ended	6 Months Ended
	May 26, 2021 USD ($) shares	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) day	Jun. 26, 2021 USD ($)	Jun. 25, 2021 USD ($)	Dec. 31, 2020 USD ($)
Debt Instrument [Line Items]
Assets			$ 8,775,421,000			$ 7,486,560,000
Inventory			1,169,601,000			491,293,000
Restricted cash			141,024,000			75,805,000
Accounts receivable, net			101,927,000			69,940,000
Liabilities			3,131,306,000			2,744,744,000
Borrowings under credit facilities			987,832,000			670,209,000
Accrued expenses and other current liabilities			175,876,000			94,487,000
Variable Interest Entity, Primary Beneficiary
Debt Instrument [Line Items]
Assets			1,300,000,000			551,200,000
Inventory			1,200,000,000			491,300,000
Restricted cash			77,600,000			53,000,000.0
Accounts receivable, net			22,200,000			3,900,000
Liabilities			847,600,000			372,500,000
Borrowings under credit facilities			824,400,000			361,200,000
Accrued expenses and other current liabilities			$ 22,100,000			10,800,000
Class C Capital Stock
Debt Instrument [Line Items]
Settlement of convertible senior notes (in shares) | shares	4,800,000
Convertible Senior Notes due 2023, 2024, 2025 and 2026 | Convertible senior notes
Debt Instrument [Line Items]
Debt instrument, convertible threshold trading days | day			20
Debt instrument, threshold consecutive trading days | day			30
Debt instrument, convertible threshold percentage			130.00%
2023 Notes | Convertible senior notes
Debt Instrument [Line Items]
Debt instrument, notice for redemption of convertible debt, amount	$ 372,800,000
Repurchase price percentage of principal amount	100.00%
Debt conversion, converted instrument, amount		$ 5,100,000
2024 Notes | Convertible senior notes
Debt Instrument [Line Items]
Debt conversion, converted instrument, amount		14,000,000.0
2021 Notes | Convertible senior notes
Debt Instrument [Line Items]
Repurchased amount		$ 194,700,000
Line of Credit | Homes segment
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 1,500,000,000
Short-term debt			824,445,000			361,166,000
Line of Credit | Mortgages segment
Debt Instrument [Line Items]
Maximum borrowing capacity			460,000,000
Comerica Bank
Debt Instrument [Line Items]
Maximum borrowing capacity				$ 60,000,000.0	$ 100,000,000.0
Comerica Bank | Line of Credit | Mortgages segment
Debt Instrument [Line Items]
Maximum borrowing capacity			60,000,000
Credit Suisse and Citibank, N.A | Mortgages segment
Debt Instrument [Line Items]
Short-term debt			$ 126,200,000			$ 240,100,000

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The carrying value as of the balance sheet date of the current portion of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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X

- Definition

Amount of cash restricted as to withdrawal or usage. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits.

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- Definition

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

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- Definition

Number of shares issued during the period as a result of the conversion of convertible securities.

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- Definition

Debt Instrument, Notice For Redemption of Convertible Debt, Amount

+ References

No definition available.

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