Vacation Ownership Contract Receivables (Allowance For Loan Losses On Vacation Ownership Contract Receivables Gross Write-Offs) (Details) $ in Millions	9 Months Ended
Sep. 30, 2026 USD ($)
Allowance for Credit Loss [Abstract]
Financing Receivable, Year One, Originated, Current Fiscal Year	$ 20
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year, Writeoff	170
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year, Writeoff	83
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year, Writeoff	44
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year, Writeoff	24
Financing Receivable, Originated, More than Five Years before Current Fiscal Year, Writeoff	22
Financing Receivable, Allowance for Credit Loss, Writeoff	$ 363

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Amount of writeoff of financing receivable, charged against allowance for credit loss.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 79
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479294/326-20-55-79

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
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-Name Accounting Standards Codification
-Section 50
-Paragraph 13
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-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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-Topic 310
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-Name Accounting Standards Codification
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-Publisher FASB
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Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

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Amount of writeoff of financing receivable originated more than five years before current fiscal year. Excludes net investment in lease.

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Amount of writeoff of financing receivable originated four years before current fiscal year. Excludes net investment in lease.

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Amount of writeoff of financing receivable originated three years before current fiscal year. Excludes net investment in lease.

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Amount of writeoff of financing receivable originated in current fiscal year. Excludes net investment in lease.

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Amount of writeoff of financing receivable originated two years before current fiscal year. Excludes net investment in lease.

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Amount of writeoff of financing receivable originated in fiscal year before current fiscal year. Excludes net investment in lease.

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