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Advances and Other Receivables, Net - Advances and Other Receivables Roll Forward (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Advances And Other Receivables, Reserves [Roll Forward] |  |  |  |
Balance - beginning of period | $ 216 | $ 98 | $ 168 | $ 47
Provision and other additions | 13 | 35 | 72 | 102
Write-offs | (38) | (3) | (49) | (19)
Balance - end of period | 191 | 130 | 191 | 130
Cumulative incurred losses related to advances and other receivables associated with inactive and liquidated loans | $ (7) | $ (18) | $ (20) | $ (46)

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