Partnerships and Joint Ventures - Joint Venture Investment Agreement (Details) $ in Millions	3 Months Ended
Mar. 31, 2019 USD ($) Company
COOEC Fluor Heavy Industries Co., Ltd.
Commitments
Ownership interest in joint venture (as a percent)	49.00%
Offshore Oil Engineering Co., Ltd. \| COOEC Fluor Heavy Industries Co., Ltd.
Commitments
Ownership interest in joint venture (as a percent)	51.00%
COOEC Fluor Heavy Industries Co., Ltd.
Commitments
Number of parties to joint venture \| Company	2
Commitment amount \| $	$ 26

Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

No definition available.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant