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Income Taxes (Tables)

12 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Income (Loss) Before Taxes

Income (loss) before taxes subject to United States and non-United States income taxes was as follows:

(Stated in millions)
	2017				2016				2015
United States	$	(841	)		$	(3,103	)		$	(691	)
Outside United States		(342	)			1,198				3,572
	$	(1,183	)		$	(1,905	)		$	2,881

Components of Net Deferred Tax Assets (Liabilities)

The components of net deferred tax assets (liabilities) were as follows:

(Stated in millions)
	2017				2016
Postretirement benefits	$	135			$	253
Intangible assets		(2,186	)			(2,869	)
Investments in non-US subsidiaries		(224	)			(271	)
Fixed assets, net		(55	)			(79	)
Inventories		126				248
Other, net		554				838
	$	(1,650	)		$	(1,880	)

Components of Tax Expense (Benefit)

The components of Tax expense (benefit) were as follows:

(Stated in millions)
	2017				2016				2015
Current:
United States-Federal	$	(170	)		$	(511	)		$	90
United States-State		57				(36	)			12
Outside United States		703				648				1,085
		590				101				1,187
Deferred:
United States-Federal	$	(225	)		$	(352	)		$	(356	)
United States-State		4				(13	)			(19	)
Outside United States		(47	)			(51	)			(52	)
Valuation allowance		8				37				(14	)
		(260	)			(379	)			(441	)
	$	330			$	(278	)		$	746

Reconciliation of US Statutory Federal Tax Rate

A reconciliation of the United States statutory federal tax rate (35%) to the consolidated effective tax rate follows:

	2017				2016				2015
US federal statutory rate		35	%			35	%			35	%
State tax		-				2				-
Non-US income taxed at different rates		(24	)			(21	)			(13	)
Charges and credits (See Note 3)		(40	)			(1	)			6
Enactment of US tax reform		(6	)			-				-
Other		7				-				(2	)
		(28	)%			15	%			26	%

Reconciliation of Liabilities Associated with Uncertain Tax Provisions

A reconciliation of the beginning and ending amount of liabilities associated with uncertain tax positions for the years ended December 31, 2017, 2016 and 2015 is as follows:

(Stated in millions)
	2017				2016				2015
Balance at beginning of year	$	1,419			$	1,285			$	1,402
Additions based on tax positions related to the current year		132				70				140
Additions for tax positions of prior years		58				119				136
Additions related to acquisitions		-				127				5
Impact of changes in exchange rates		23				(25	)			(78	)
Settlements with tax authorities		(41	)			(45	)			(99	)
Reductions for tax positions of prior years		(157	)			(85	)			(203	)
Reductions due to the lapse of the applicable statute of limitations		(41	)			(27	)			(18	)
Balance at end of year	$	1,393			$	1,419			$	1,285

Tax Years Subject to Examination by Tax Authorities

The following table summarizes the tax years that are either currently under audit or remain open and subject to examination by the tax authorities in the most significant jurisdictions in which Schlumberger operates:

Brazil	2012 - 2017
Canada	2010 - 2017
Ecuador	2014 - 2017
Mexico	2011 - 2017
Norway	2013 - 2017
Russia	2014 - 2017
Saudi Arabia	2004 - 2017
United Kingdom	2015 - 2017
United States	2014 - 2017

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