CONSOLIDATED STATEMENT OF INCOME (LOSS) (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Revenue
Total Revenue	$ 5,847	$ 5,258	$ 16,704	$ 18,069
Interest & other income	56	22	91	94
Expenses
Research & engineering	140	137	409	452
General & administrative	80	85	231	293
Impairments & other		350		12,596
Interest	130	138	402	419
Income (loss) before taxes	691	(54)	1,618	(11,769)
Tax expense (benefit)	129	19	301	(901)
Net income (loss)	562	(73)	1,317	(10,868)
Net income attributable to noncontrolling interests	12	9	37	24
Net income (loss) attributable to Schlumberger	$ 550	$ (82)	$ 1,280	$ (10,892)
Basic income (loss) per share of Schlumberger	$ 0.39	$ (0.06)	$ 0.92	$ (7.84)
Diluted income (loss) per share of Schlumberger	$ 0.39	$ (0.06)	$ 0.90	$ (7.84)
Average shares outstanding:
Basic	1,402	1,391	1,399	1,389
Assuming dilution	1,424	1,391	1,422	1,389
Services
Revenue
Total Revenue	$ 4,020	$ 3,666	$ 11,291	$ 12,812
Expenses
Cost of services and sales	3,334	3,127	9,588	11,236
Product
Revenue
Total Revenue	1,827	1,592	5,413	5,257
Expenses
Cost of services and sales	$ 1,528	$ 1,497	$ 4,547	$ 4,936