Supplemental Balance Sheet and Income Statement Information - Other Expense (Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Other expense (income)
Losses (gains) on sales, disposals and involuntary conversions of long-lived assets	$ 67,320	$ (2,742)	$ 69,577	$ 133
Transaction related costs	5,894	1,929	12,938	1,929
Litigation expenses and reserves	4,677	789	8,277	1,610
Foreign currency transaction losses (gains)	3,758	1,614	6,280	2,490
(Gain) loss on debt buyback		7,348		15,944
Other losses (gains)	(4,048)	1,166	(5,382)	1,508
Other expense (income)	77,601	$ 10,104	91,690	$ 23,614
Jack Up Rigs
Other expense (income)
Loss on sale of offshore rigs	$ (63,700)		$ (63,700)