CONSOLIDATED STATEMENT OF INCOME (LOSS) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Revenue
Total Revenue	$ 23,601	$ 32,917	$ 32,815
Interest & other income	163	86	149
Gains on sales of businesses	104	247	215
Expenses
Research & engineering	580	717	702
General & administrative	365	474	444
Impairments & other	12,658	13,148	356
Interest	563	609	575
Income (loss) before taxes	(11,298)	(10,418)	2,624
Tax expense (benefit)	(812)	(311)	447
Net income (loss)	(10,486)	(10,107)	2,177
Net income attributable to noncontrolling interests	32	30	39
Net income (loss) attributable to Schlumberger	$ (10,518)	$ (10,137)	$ 2,138
Basic earnings (loss) per share of Schlumberger	$ (7.57)	$ (7.32)	$ 1.54
Diluted earnings (loss) per share of Schlumberger	$ (7.57)	$ (7.32)	$ 1.53
Average shares outstanding:
Basic	1,390	1,385	1,385
Assuming dilution	1,390	1,385	1,393
Services
Revenue
Total Revenue	$ 16,533	$ 24,358	$ 24,296
Expenses
Cost of services and sales	14,675	20,828	20,618
Product
Revenue
Total Revenue	7,068	8,559	8,519
Expenses
Cost of services and sales	$ 6,325	$ 7,892	$ 7,860