Inventory (Narrative) (Details) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | ||
---|---|---|---|---|
Jun. 30, 2017 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
|
Inventory [Line Items] | ||||
Property and Equipment transferred to Inventory | $ 41 | |||
Inventory transferred to Property and Equipment | $ 23 | |||
Asset impairments | 27 | $ (4) | $ 205 | |
Maximum potential future payments | 1,260 | |||
Inventory write-down | 28 | |||
Inventory Sale | ||||
Inventory [Line Items] | ||||
Asset impairments | 27 | |||
Las Vegas, Nevada and St. Thomas, U.S. Virgin Island Inventory Sales | ||||
Inventory [Line Items] | ||||
Maximum potential future payments | $ 124 | |||
VOI Development | ||||
Inventory [Line Items] | ||||
Asset impairments | $ 135 | 135 | ||
Inventory write-down | $ 28 |