Accounts Receivable, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net	$ 1,236	$ 1,270
Accounts receivable sold, derecognized and uncollected at balance sheet date	165	131
Accounts receivable sales	393	405	$ 1,733
Deferred proceeds	0	0	164
Loss on sale of accounts receivable	3	3	$ 10
Accounts Receivable
Accounts, Notes, Loans and Financing Receivable [Line Items]
Invoiced	980	992
Accrued	311	334
Allowance for doubtful accounts	$ (55)	$ (56)