Vacation Ownership Contract Receivables (Allowance For Loan Losses On Vacation Ownership Contract Receivables) (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||||||
|---|---|---|---|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
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| Allowance for Loan Losses [Roll Forward] | ||||||||
| Allowance for loan losses, beginning balance | $ 663 | $ 614 | ||||||
| Provision for Loan, Lease, and Other Losses | $ 148 | $ 146 | 389 | [1] | 365 | [1] | ||
| Financing Receivable, Allowance for Credit Loss, Write-off, net | (357) | (325) | ||||||
| Allowance for loan losses, ending balance | 748 | 654 | 748 | 654 | ||||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||||||
| Financing Receivable, Allowance for Credit Loss | $ 748 | $ 654 | 748 | 654 | ||||
| Acruired | ||||||||
| Allowance for Loan Losses [Roll Forward] | ||||||||
| Allowance for loan losses, beginning balance | $ 53 | $ 0 | ||||||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||||||||
| Financing Receivable, Allowance for Credit Loss | ||||||||
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