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Debt (Term Loan) (Details) £ in Millions, $ in Millions	Dec. 31, 2019 USD ($)	Dec. 31, 2019 GBP (£)	Dec. 31, 2016 GBP (£)
Term loan
Debt Instrument [Line Items]
Debt instrument, face amount			£ 160.0
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid		£ 16.0
Interest rate, stated percentage			2.813%
Debt Instrument, Annual Principal Payment		£ 13.1
Technip Odebrecht PLSV CV
Debt Instrument [Line Items]
Short-term and current portion of long-term debt \| $	$ 203.1