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Intangible Assets (Details) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2021 | Dec. 31, 2020
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |  |
Carrying amount of total other intangibles |  | $ 538 | $ 588
Accumulated Amortization |  | 363 | 400
Net carrying amount of finite-lived and indefinite-lived intangible assets |  | 175 | 188
Indefinite life—Trademarks (b) |  |  |
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |  |
Gross carrying amount of indefinite-lived intangible assets | [1] | 685 | 685
Indefinite life—Title plant shares (e) |  |  |
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |  |
Gross carrying amount of indefinite-lived intangible assets | [2] | 25 | 20
Amortizable—Franchise agreements (a) |  |  |
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |  |
Gross carrying amount of finite-lived intangible assets | [3] | 2,010 | 2,010
Accumulated Amortization | [3] | 972 | 922
Net carrying amount of finite-lived intangible assets | [3] | 1,038 | 1,088
Amortizable—License agreements (c) |  |  |
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |  |
Gross carrying amount of finite-lived intangible assets | [4] | 45 | 45
Accumulated Amortization | [4] | 14 | 13
Net carrying amount of finite-lived intangible assets | [4] | $ 31 | 32
Amortization period |  | 50 years |
Amortizable—Customer relationships (d) |  |  |
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |  |
Gross carrying amount of finite-lived intangible assets | [5] | $ 456 | 509
Accumulated Amortization | [5] | 339 | 376
Net carrying amount of finite-lived intangible assets | [5] | 117 | 133
Amortizable—Other (f) |  |  |
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |  |
Gross carrying amount of finite-lived intangible assets | [6] | 12 | 14
Accumulated Amortization | [6] | 10 | 11
Net carrying amount of finite-lived intangible assets | [6] | $ 2 | $ 3
Realogy Franchise Group | Amortizable—Franchise agreements (a) |  |  |
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |  |
Amortization period |  | 30 years |
Minimum | Amortizable—Customer relationships (d) |  |  |
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |  |
Amortization period |  | 2 years |
Minimum | Amortizable—Other (f) |  |  |
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |  |
Amortization period |  | 5 years |
Maximum | Amortizable—Customer relationships (d) |  |  |
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |  |
Amortization period |  | 20 years |
Maximum | Amortizable—Other (f) |  |  |
Finite-Lived and Indefinite-Lived Intangible Assets [Line Items] |  |  |
Amortization period |  | 10 years |
[1] | Primarily related to real estate franchise brands which are expected to generate future cash flows for an indefinite period of time.
[2] | Ownership in a title plant is required to transact title insurance in certain states. The Company expects to generate future cash flows for an indefinite period of time.
[3] | Generally amortized over a period of 30 years.
[4] | Relates to the Sotheby’s International Realty® and Better Homes and Gardens® Real Estate agreements which are being amortized over 50 years (the contractual term of the license agreements).
[5] | Relates to the customer relationships at Realogy Franchise Group, Realogy Title Group and Realogy Brokerage Group. These relationships are being amortized over a period of 2 to 20 years.
[6] | Consists of covenants not to compete which are amortized over their contract lives and other intangibles which are generally amortized over periods ranging from 5 to 10 years.

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