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Long-term Debt and Debt Facility Agreements - Additional Information (Detail)
$ in Millions, € in Billions
3 Months Ended 12 Months Ended
Dec. 31, 2018
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2018
EUR (€)
Jun. 30, 2017
Debt Instrument [Line Items]          
Committed credit facility agreement aggregated $ 6,500 $ 6,500      
Unused credit facility 4,100 4,100      
Short-term borrowings and current portion of long-term debt 1,407 1,407 $ 3,324    
Long-term debt, carrying amount $ 14,644 $ 14,644 14,875    
Debt instrument interest rate         6.50%
Weighted average interest rate on variable rate debt 3.50% 3.50%   3.50%  
Long-term Debt maturity in 2020 $ 2,100 $ 2,100      
Long-term Debt maturity in 2021 3,100 3,100      
Long-term Debt maturity in 2022 4,400 4,400      
Long-term Debt maturity in 2023 2,100 2,100      
Long-term Debt maturity in 2025 1,800 1,800      
Long-term Debt maturity in 2026 700 700      
Long-term Debt maturity thereafter 400 400      
Long-term debt, fair value 14,600 14,600 $ 15,200    
1.00% Guaranteed Notes due 2026          
Debt Instrument [Line Items]          
Long-term debt, carrying amount $ 678 $ 678      
Guaranteed notes face amount | €       € 600  
Debt instrument interest rate 1.00% 1.00% 1.00% 1.00%  
Debt instrument maturity date 2026 2026 2026    
Commercial paper programs mature in February 2019          
Debt Instrument [Line Items]          
Committed credit facility agreement aggregated $ 1,000 $ 1,000      
Commercial paper programs mature in November 2020          
Debt Instrument [Line Items]          
Committed credit facility agreement aggregated 1,500 1,500      
Commercial paper programs mature in February 2022          
Debt Instrument [Line Items]          
Committed credit facility agreement aggregated 2,000 2,000      
Commercial paper programs mature in February 2023          
Debt Instrument [Line Items]          
Committed credit facility agreement aggregated 2,000 2,000      
Commercial paper borrowings          
Debt Instrument [Line Items]          
Short-term borrowings and current portion of long-term debt     $ 1,300    
Long-term debt, carrying amount 2,433 2,433 1,694    
Long-term debt $ 2,400 $ 2,400 3,000    
Long-term debt, fair value     $ 135    
Schlumberger Investment SA          
Debt Instrument [Line Items]          
Investment in subsidiary   100.00%