Receivables (Narrative) (Details) - USD ($) $ in Millions	1 Months Ended	12 Months Ended
	Jul. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Receivables [Abstract]
Accounts receivable securitization facilities	$ 200
Accounts receivable securitization facilities, maximum available	375
Proceeds from accounts receivable securitization	$ 106
Expenses related to securitization and factoring facilities		$ 23	$ 21	$ 15