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v3.8.0.1

Supplemental Guarantor Information - Consolidating Statements of Operations (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
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Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2015
Unaudited Supplemental Consolidating Statement of Operations |  |  |  |  |  |  |  |  |  |  |
Goodwill impairment |  |  |  |  |  |  |  |  | $ 0.0 | $ 7.2 | $ 9.8
Income before income taxes | $ 485.5 | $ 444.5 | $ 353.9 | $ 318.1 | $ 433.0 | $ 378.6 | $ 300.5 | $ 241.3 | 1,602.1 | 1,353.5 | 1,123.4
Income tax expense (benefit) | 172.3 | 155.5 | 124.7 | 111.2 | 149.4 | 128.8 | 105.4 | 83.6 | 563.7 | 467.2 | 372.7
Net income | 313.2 | 289.0 | 229.2 | 206.9 | 283.6 | 249.8 | 195.1 | 157.7 | 1,038.4 | 886.3 | 750.7
Comprehensive income |  |  |  |  |  |  |  |  | 1,038.4 | 884.9 | 749.9
Homebuilding [Member] |  |  |  |  |  |  |  |  |  |  |
Unaudited Supplemental Consolidating Statement of Operations |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 13,741.5 | 11,861.8 | 10,559.0
Cost of sales |  |  |  |  |  |  |  |  | 11,042.8 | 9,502.6 | 8,535.7
Gross profit | $ 802.5 | $ 723.4 | $ 614.5 | $ 558.2 | 732.6 | $ 625.8 | $ 531.7 | $ 468.9 | 2,698.7 | 2,359.2 | 2,023.3
Selling, general and administrative expense |  |  |  |  |  |  |  |  | 1,220.4 | 1,100.3 | 1,003.0
Goodwill impairment |  |  |  |  | $ 7.2 |  |  |  | 0.0 | 7.2 | 9.8
Equity in (income) of subsidiaries |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 0.0
Other (income) |  |  |  |  |  |  |  |  | (11.0) | (12.7) | (7.8)
Income before income taxes |  |  |  |  |  |  |  |  | 1,489.3 | 1,264.4 | 1,018.3
Financial Services [Member] |  |  |  |  |  |  |  |  |  |  |
Unaudited Supplemental Consolidating Statement of Operations |  |  |  |  |  |  |  |  |  |  |
Income before income taxes |  |  |  |  |  |  |  |  | 112.8 | 89.1 | 105.1
Financial Services [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues, net of recourse and reinsurance expense |  |  |  |  |  |  |  |  | 349.5 | 295.6 | 265.0
General and administrative expense |  |  |  |  |  |  |  |  | 251.2 | 220.0 | 183.0
Interest and other income |  |  |  |  |  |  |  |  | (14.5) | (13.5) | (23.1)
D.R Horton, Inc. [Member] |  |  |  |  |  |  |  |  |  |  |
Unaudited Supplemental Consolidating Statement of Operations |  |  |  |  |  |  |  |  |  |  |
Income before income taxes |  |  |  |  |  |  |  |  | 1,602.7 | 1,358.7 | 1,123.4
Income tax expense (benefit) |  |  |  |  |  |  |  |  | 563.9 | 469.0 | 372.7
Net income |  |  |  |  |  |  |  |  | 1,038.8 | 889.7 | 750.7
Comprehensive income |  |  |  |  |  |  |  |  | 1,038.8 | 888.3 | 750.7
D.R Horton, Inc. [Member] | Homebuilding [Member] |  |  |  |  |  |  |  |  |  |  |
Unaudited Supplemental Consolidating Statement of Operations |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 4,773.6 | 3,947.5 | 3,334.6
Cost of sales |  |  |  |  |  |  |  |  | 3,827.6 | 3,163.6 | 2,698.1
Gross profit |  |  |  |  |  |  |  |  | 946.0 | 783.9 | 636.5
Selling, general and administrative expense |  |  |  |  |  |  |  |  | 584.3 | 503.8 | 461.2
Goodwill impairment |  |  |  |  |  |  |  |  |  | 0.0 | 0.0
Equity in (income) of subsidiaries |  |  |  |  |  |  |  |  | (1,232.7) | (1,071.0) | (945.9)
Other (income) |  |  |  |  |  |  |  |  | (8.3) | (7.6) | (2.2)
Income before income taxes |  |  |  |  |  |  |  |  | 1,602.7 | 1,358.7 | 1,123.4
D.R Horton, Inc. [Member] | Financial Services [Member] |  |  |  |  |  |  |  |  |  |  |
Unaudited Supplemental Consolidating Statement of Operations |  |  |  |  |  |  |  |  |  |  |
Income before income taxes |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 0.0
Financial Services [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues, net of recourse and reinsurance expense |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 0.0
General and administrative expense |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 0.0
Interest and other income |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 0.0
Guarantor Subsidiaries [Member] |  |  |  |  |  |  |  |  |  |  |
Unaudited Supplemental Consolidating Statement of Operations |  |  |  |  |  |  |  |  |  |  |
Income before income taxes |  |  |  |  |  |  |  |  | 1,110.3 | 976.8 | 846.4
Income tax expense (benefit) |  |  |  |  |  |  |  |  | 388.6 | 334.9 | 277.2
Net income |  |  |  |  |  |  |  |  | 721.7 | 641.9 | 569.2
Comprehensive income |  |  |  |  |  |  |  |  | 721.7 | 641.9 | 568.4
Guarantor Subsidiaries [Member] | Homebuilding [Member] |  |  |  |  |  |  |  |  |  |  |
Unaudited Supplemental Consolidating Statement of Operations |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 8,939.5 | 7,930.3 | 7,224.4
Cost of sales |  |  |  |  |  |  |  |  | 7,199.6 | 6,357.5 | 5,834.3
Gross profit |  |  |  |  |  |  |  |  | 1,739.9 | 1,572.8 | 1,390.1
Selling, general and administrative expense |  |  |  |  |  |  |  |  | 631.0 | 592.7 | 538.8
Goodwill impairment |  |  |  |  |  |  |  |  |  | 7.2 | 9.8
Equity in (income) of subsidiaries |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 0.0
Other (income) |  |  |  |  |  |  |  |  | (1.4) | (3.9) | (4.9)
Income before income taxes |  |  |  |  |  |  |  |  | 1,110.3 | 976.8 | 846.4
Guarantor Subsidiaries [Member] | Financial Services [Member] |  |  |  |  |  |  |  |  |  |  |
Unaudited Supplemental Consolidating Statement of Operations |  |  |  |  |  |  |  |  |  |  |
Income before income taxes |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 0.0
Financial Services [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues, net of recourse and reinsurance expense |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 0.0
General and administrative expense |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 0.0
Interest and other income |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 0.0
Non-Guarantor Subsidiaries [Member] |  |  |  |  |  |  |  |  |  |  |
Unaudited Supplemental Consolidating Statement of Operations |  |  |  |  |  |  |  |  |  |  |
Income before income taxes |  |  |  |  |  |  |  |  | 122.4 | 94.2 | 99.5
Income tax expense (benefit) |  |  |  |  |  |  |  |  | 45.9 | 35.5 | 37.4
Net income |  |  |  |  |  |  |  |  | 76.5 | 58.7 | 62.1
Comprehensive income |  |  |  |  |  |  |  |  | 76.5 | 58.7 | 62.1
Non-Guarantor Subsidiaries [Member] | Homebuilding [Member] |  |  |  |  |  |  |  |  |  |  |
Unaudited Supplemental Consolidating Statement of Operations |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 37.5 | 0.0 | 0.0
Cost of sales |  |  |  |  |  |  |  |  | 24.1 | (7.7) | 3.3
Gross profit |  |  |  |  |  |  |  |  | 13.4 | 7.7 | (3.3)
Selling, general and administrative expense |  |  |  |  |  |  |  |  | 5.1 | 3.8 | 3.0
Goodwill impairment |  |  |  |  |  |  |  |  |  | 0.0 | 0.0
Equity in (income) of subsidiaries |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 0.0
Other (income) |  |  |  |  |  |  |  |  | (1.3) | (1.2) | (0.7)
Income before income taxes |  |  |  |  |  |  |  |  | 9.6 | 5.1 | (5.6)
Non-Guarantor Subsidiaries [Member] | Financial Services [Member] |  |  |  |  |  |  |  |  |  |  |
Unaudited Supplemental Consolidating Statement of Operations |  |  |  |  |  |  |  |  |  |  |
Income before income taxes |  |  |  |  |  |  |  |  | 112.8 | 89.1 | 105.1
Financial Services [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues, net of recourse and reinsurance expense |  |  |  |  |  |  |  |  | 349.5 | 295.6 | 265.0
General and administrative expense |  |  |  |  |  |  |  |  | 251.2 | 220.0 | 183.0
Interest and other income |  |  |  |  |  |  |  |  | (14.5) | (13.5) | (23.1)
Consolidation, Eliminations [Member] |  |  |  |  |  |  |  |  |  |  |
Unaudited Supplemental Consolidating Statement of Operations |  |  |  |  |  |  |  |  |  |  |
Income before income taxes |  |  |  |  |  |  |  |  | (1,233.3) | (1,076.2) | (945.9)
Income tax expense (benefit) |  |  |  |  |  |  |  |  | (434.7) | (372.2) | (314.6)
Net income |  |  |  |  |  |  |  |  | (798.6) | (704.0) | (631.3)
Comprehensive income |  |  |  |  |  |  |  |  | (798.6) | (704.0) | (631.3)
Consolidation, Eliminations [Member] | Homebuilding [Member] |  |  |  |  |  |  |  |  |  |  |
Unaudited Supplemental Consolidating Statement of Operations |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | (9.1) | (16.0) | 0.0
Cost of sales |  |  |  |  |  |  |  |  | (8.5) | (10.8) | 0.0
Gross profit |  |  |  |  |  |  |  |  | (0.6) | (5.2) | 0.0
Selling, general and administrative expense |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 0.0
Goodwill impairment |  |  |  |  |  |  |  |  |  | 0.0 | 0.0
Equity in (income) of subsidiaries |  |  |  |  |  |  |  |  | 1,232.7 | 1,071.0 | 945.9
Other (income) |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 0.0
Income before income taxes |  |  |  |  |  |  |  |  | (1,233.3) | (1,076.2) | (945.9)
Consolidation, Eliminations [Member] | Financial Services [Member] |  |  |  |  |  |  |  |  |  |  |
Unaudited Supplemental Consolidating Statement of Operations |  |  |  |  |  |  |  |  |  |  |
Income before income taxes |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 0.0
Financial Services [Abstract] |  |  |  |  |  |  |  |  |  |  |
Revenues, net of recourse and reinsurance expense |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 0.0
General and administrative expense |  |  |  |  |  |  |  |  | 0.0 | 0.0 | 0.0
Interest and other income |  |  |  |  |  |  |  |  | $ 0.0 | $ 0.0 | $ 0.0

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