Revenue Recognition (Narrative) (Details) - USD ($) $ in Millions |
9 Months Ended | |
|---|---|---|
Sep. 30, 2019 |
Dec. 31, 2018 |
|
| Revenue from Contract with Customer [Abstract] | ||
| Franchise agreement, revenue recognition period (within) | 12 years | |
| Co-branded credit card program, revenue recognition period (within) | 1 year | |
| Capitalized Contract Cost [Line Items] | ||
| Capitalized contract costs | $ 31 | $ 24 |
| Other Current Assets | ||
| Capitalized Contract Cost [Line Items] | ||
| Capitalized contract costs | 6 | 8 |
| Other Noncurrent Assets | ||
| Capitalized Contract Cost [Line Items] | ||
| Capitalized contract costs | $ 25 | $ 16 |
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Definition Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Revenue Recognition Period, Co-branded Credit Card Program No definition available.
|
| X | ||||||||||
- Definition Revenue Recognition Period, Franchise Agreement No definition available.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|