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Document and Entity Information
Feb. 10, 2020
Cover [Abstract]  
Entity Registrant Name MCDERMOTT INTERNATIONAL INC
Security Exchange Name NONE
Amendment Flag false
Entity Central Index Key 0000708819
Document Type 8-K
Document Period End Date Feb. 10, 2020
Entity Incorporation, State or Country Code R1
Entity File Number 001-08430
Entity Tax Identification Number 72-0593134
Entity Address, Address Line One 757 N. Eldridge Parkway
Entity Address, City or Town Houston
Entity Address, State or Province TX
Entity Address, Postal Zip Code 77079
City Area Code 281
Local Phone Number 870-5000
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, par value $1.00 per share
Trading Symbol MDRIQ
Entity Emerging Growth Company false