
	Three months ended
	March 31,		June 30,		September 30,		December 31,
	(In millions, except per share data)
2016
Operating revenues	$	1,341	$	940	$	906	$	974
Operating income (a)		424		163		229		316
Income from continuing operations (a)		242		92		236		257
Net income (a)		241		93		236		257
Net income attributable to controlling interest (a)		235		82		218		243
Per share earnings from continuing operations
Basic	$	0.64	$	0.22	$	0.59	$	0.64
Diluted	$	0.64	$	0.22	$	0.59	$	0.64
Weighted-average shares outstanding
Basic		364		365		365		371
Diluted		364		365		365		371

2015
Operating revenues	$	2,043	$	1,884	$	1,608	$	1,851
Operating income (loss) (b)		(327)		493		457		742
Income (loss) from continuing operations (b)		(459)		340		392		622
Net income (loss) (b)		(461)		341		395		622
Net income (loss) attributable to controlling interest (b)		(472)		335		386		616
Per share earnings (loss) from continuing operations
Basic	$	(1.30)	$	0.91	$	1.06	$	1.68
Diluted	$	(1.30)	$	0.91	$	1.06	$	1.68
Weighted-average shares outstanding
Basic		363		363		364		364
Diluted		363		363		364		364

(a)

First quarter, second quarter, third quarter and fourth quarter included an aggregate loss $41 million associated with the impairment of certain drilling units classified as assets held for sale. Fourth quarter included a loss of $52 million associated with the impairment of our deepwater asset group. Fourth quarter included income of $30 million associated with recoveries of previously incurred costs associated with the Macondo well incident. Second quarter and third quarter included a gain of $38 million and $110 million, respectively, associated with the retirement of debt. See Note 6—Impairments, Note 11—Debt and Note 13—Commitments and Contingencies.

First quarter, second quarter, third quarter and fourth quarter included an aggregate loss of $700 million associated with the impairment of certain drilling units classified as assets held for sale. First quarter and second quarter included a loss of $507 million and $668 million, respectively, associated with the impairment of our deepwater asset group and midwater asset group, respectively. Second quarter included income of $788 million associated with recoveries of previously incurred costs associated with the Macondo well incident. Third quarter and fourth quarter included an aggregate net gain of $23 million associated with the retirement of debt. See Note 6—Impairments, Note 11—Debt and Note 13—Commitments and Contingencies.