Summary of Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Reconciliation of Earnings Per Share

The following is a reconciliation from basic to diluted earnings (loss) per share of Schlumberger for each of the last three years:

(Stated in millions, except per share amounts)
	Net Income (Loss) Attributable to Schlumberger			Average Shares Outstanding		Earnings (Loss) per Share
2018:
Basic	$	2,138			1,385	$	1.54
Assumed exercise of stock options		-			-
Unvested restricted stock		-			8
Diluted	$	2,138			1,393	$	1.53
2017:
Basic	$	(1,505	)		1,388	$	(1.08	)
Assumed exercise of stock options		-			-
Unvested restricted stock		-			-
Diluted	$	(1,505	)		1,388	$	(1.08	)
2016:
Basic	$	(1,687	)		1,357	$	(1.24	)
Assumed exercise of stock options		-			-
Unvested restricted stock		-			-
Diluted	$	(1,687	)		1,357	$	(1.24	)

Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share

The number of outstanding employee stock options to purchase shares of Schlumberger common stock and unvested restricted stock units that were not included in the computation of diluted earnings/loss per share, because to do so would have had an anti-dilutive effect, were as follows:

(Stated in millions)
	2018		2017		2016
Employee stock options		40		47		47
Unvested restricted stock		-		5		5