Other operating items (Tables)

12 Months Ended

Dec. 31, 2019

Other Operating Gains (Losses) [Abstract]

Other operating items

Other operating items comprise the following: 

(In US$ millions)	2019	2018		2017
Loss on impairment of goodwill	—	(3.2	)	—
Revaluation of contingent consideration	0.7	—		89.9
Gain on sale of assets	—	—		0.8
Total	0.7	(3.2	)	90.7