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v3.21.2

Notes Payable - Terms (Details) - Home Building Consolidated - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2020 | Sep. 30, 2021 | Oct. 31, 2020
Senior Note Member Twenty Five [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Face Amount |  | $ 350 |
Debt Instrument, Maturity Date |  | Sep. 15, 2022 |
Debt Instrument, Call Feature |  | Yes |
Debt Instrument, Interest Rate, Effective Percentage |  | 4.50% |
Senior notes, stated interest rate |  | 4.375% |
Senior Note Twenty Seven [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Face Amount |  | $ 300 |
Debt Instrument, Maturity Date |  | Feb. 15, 2023 |
Debt Instrument, Call Feature |  | Yes |
Debt Instrument, Interest Rate, Effective Percentage |  | 4.90% |
Senior notes, stated interest rate |  | 4.75% |
SeniorNoteTwentyEight [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Face Amount |  | $ 400 |
Debt Instrument, Maturity Date |  | Aug. 15, 2023 |
Debt Instrument, Call Feature |  | Yes |
Debt Instrument, Interest Rate, Effective Percentage |  | 5.90% |
Senior notes, stated interest rate |  | 5.75% |
SeniorNoteFortyTwo [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Face Amount |  | $ 500 | $ 500
Debt Instrument, Maturity Date | Oct. 15, 2027 | Oct. 15, 2024 |
Debt Instrument, Call Feature |  | Yes |
Debt Instrument, Interest Rate, Effective Percentage |  | 2.70% | 1.60%
Senior notes, stated interest rate |  | 2.50% | 1.40%
SeniorNoteFortyFour |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Face Amount |  | $ 500 |
Debt Instrument, Maturity Date |  | Oct. 15, 2025 |
Debt Instrument, Call Feature |  | Yes |
Debt Instrument, Interest Rate, Effective Percentage |  | 2.80% |
Senior notes, stated interest rate |  | 2.60% |
SeniorNoteFortySIx |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Face Amount |  | $ 600 |
Debt Instrument, Maturity Date |  | Oct. 15, 2026 |
Debt Instrument, Call Feature |  | Yes |
Debt Instrument, Interest Rate, Effective Percentage |  | 1.50% |
Senior notes, stated interest rate |  | 1.30% |
Senior Note Forty Five [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Face Amount |  | $ 500 |
Debt Instrument, Maturity Date |  | Oct. 15, 2027 |
Debt Instrument, Call Feature |  | Yes |
Debt Instrument, Interest Rate, Effective Percentage |  | 1.60% |
Senior notes, stated interest rate |  | 1.40% |
Senior Notes [Member] |  |  |
Debt Instrument [Line Items] |  |  |
Debt Instrument, Redemption Price, Percentage |  | 100.00% |

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