Accounts Receivable, Net - Schedule of Allowance for Credit Losses (Details) $ in Millions	9 Months Ended
	Sep. 30, 2020 USD ($)
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance as of December 31, 2019	$ 83
Impact of credit standard adoption	83
Current period provision for expected credit losses	28
Write-offs charged against the allowance for expected credit losses	(9)
Other	26
Balance as of March 31, 2020	156
Cumulative Effect, Period Of Adoption, Adjustment
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Balance as of December 31, 2019	28
Impact of credit standard adoption	$ 28