CONSOLIDATED STATEMENT OF INCOME (LOSS) (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenue
Total Revenue	$ 5,223	$ 7,455
Interest & other income	19	39
Expenses
Research & engineering	135	173
General & administrative	81	127
Impairments & other		8,523
Interest	136	136
Income (loss) before taxes	386	(8,089)
Tax expense (benefit)	74	(721)
Net income (loss)	312	(7,368)
Net income attributable to noncontrolling interests	13	8
Net income (loss) attributable to Schlumberger	$ 299	$ (7,376)
Basic income (loss) per share of Schlumberger	$ 0.21	$ (5.32)
Diluted income (loss) per share of Schlumberger	$ 0.21	$ (5.32)
Average shares outstanding:
Basic	1,398	1,387
Assuming dilution	1,419	1,387
Services
Revenue
Total Revenue	$ 3,482	$ 5,426
Expenses
Cost of services and sales	3,031	4,727
Product
Revenue
Total Revenue	1,741	2,029
Expenses
Cost of services and sales	$ 1,473	$ 1,897