Summary of Significant Accounting Policies (Principles of Consolidation and Use of Estimates) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2016
Germany [Member] | European Segment [Member] | Submarine Turnkey Project [Member]
Schedule of Accounting Policies [Line Items]
Increase to gross profit	$ 18.3
Maximum [Member]
Schedule of Accounting Policies [Line Items]
Percentage of ownership recorded at cost		20.00%
Significant Influence [Member]
Schedule of Accounting Policies [Line Items]
Minimum percent of ownership to exercise significant influence		20.00%
Maximum percent of ownership to exercise significant influence		50.00%