Advances and Other Receivables, Net - Advances and Other Receivables Roll Forward (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Advances And Other Receivables, Reserves [Roll Forward]
Balance - beginning of period	$ 193	$ 71	$ 168	$ 47
Provision and other additions	29	37	59	67
Write-offs	(6)	(10)	(11)	(16)
Balance - end of period	216	98	216	98
Cumulative incurred losses related to advances and other receivables associated with inactive and liquidated loans	$ (3)	$ (17)	$ (13)	$ (28)