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Segment Information and Revenue - Depreciation and Amortization Expense and Share-Based Compensation Expense (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Depreciation and amortization | $ 157 | $ 130 | $ 111
Share-based compensation | 451 | 312 | 197
IMT |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Depreciation and amortization | 137 | 99 | 90
Share-based compensation | 356 | 201 | 135
Mortgages |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Depreciation and amortization | 11 | 8 | 7
Share-based compensation | 60 | 34 | 15
Homes |  |  |
Segment Reporting, Revenue Reconciling Item [Line Items] |  |  |
Depreciation and amortization | 2 | 13 | 8
Share-based compensation | $ 17 | $ 41 | $ 20

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- Definition The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (e) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 + Details
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- Definition Amount of noncash expense for share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 + Details
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