(US$ m)	Q4 2019	Q3 2019	Q2 2019	Q1 2019	Q4 2018	FY 2019	FY 2018
Net cash from operating activities	775	429	324	341	656	1,869	1,845
Net cash used in investing activities	(314)	(59)	(391)	(408)	(284)	(1,172)	(1,212)
Payment for purchase and proceeds from matured marketable securities, and investment in short-term deposits	-	(200)	-	-	(9)	(200)	(100)
Free cash flow	461	170	(67)	(67)	363	497	533

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