CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) (Unaudited) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Statement Of Income And Comprehensive Income [Abstract]
Net income (loss)	$ (7,368)	$ 430
Currency translation adjustments
Unrealized net change arising during the period	(125)	77
Cash flow hedges
Net loss on cash flow hedges	(203)	(5)
Reclassification to net income (loss) of net realized loss	(1)	(2)
Pension and other postretirement benefit plans
Amortization to net income (loss) of net actuarial loss	51	24
Amortization to net income (loss) of net prior service credit	(5)	(3)
Income taxes on pension and other postretirement benefit plans	(4)
Comprehensive income (loss)	(7,653)	525
Comprehensive income attributable to noncontrolling interests	8	9
Comprehensive income (loss) attributable to Schlumberger	$ (7,661)	$ 516

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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