Advances and Other Receivables, Net - Advances and Other Receivables Roll Forward (Details) - Reserves for Advances and Other Receivables - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance - beginning of period	$ 47
Provision and other additions	30
Write-offs	(6)
Balance - end of period	$ 71
Predecessor
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance - beginning of period		$ 284
Provision and other additions		22
Write-offs		(29)
Balance - end of period		$ 277