	Three months ended
	March 31,		June 30,			September 30,			December 31,
	(In millions, except per share data)
2013
Operating revenues	$	2,197	$	2,397		$	2,558		$	2,332
Operating income (a)	473		602			742			407
Income from continuing operations (a)	313		321			544			228
Net income (a) (b)	329		303			544			231
Net income attributable to controlling interest (a) (b)	321		307			546			233
Per share earnings from continuing operations
Basic	$	0.88	$	0.87		$	1.49		$	0.62
Diluted	$	0.88	$	0.87		$	1.49		$	0.62
Weighted-average shares outstanding
Basic	360		360			361			361
Diluted	360		360			361			361

2012
Operating revenues	$	2,110	$	2,329		$	2,431		$	2,326
Operating income (loss) (c)	371		(142		)	811			541
Income (loss) from continuing operations (c)	154		(303		)	533			432
Net income (loss) (c) (d)	18		(303		)	(383		)	457
Net income (loss) attributable to controlling interest (c) (d)	10		(304		)	(381		)	456
Per share earnings (loss) from continuing operations
Basic	$	0.42	$	(0.86	)	$	1.49		$	1.19
Diluted	$	0.42	$	(0.86	)	$	1.49		$	1.19
Weighted-average shares outstanding
Basic	350		353			359			359
Diluted	350		353			359			360

(a) First quarter and third quarter included losses of $74 million and $29 million, respectively, associated with loss contingencies related to Macondo well incident. Second quarter included an aggregate loss of $37 million associated with the impairment of certain drilling units classified as assets held for sale. Third quarter included a gain of $33 million associated with the sale of Transocean Richardson. See Note 5—Impairments, Note 10—Drilling Fleet and Note 15-Commitments and Contingencies.

(b) First, second, third and fourth quarters included aggregate gains of $15 million, $3 million, $31 million and $5 million, respectively, associated with the disposal of assets of our discontinued operations. See Note 7—Discontinued Operations.

(c) First quarter included an adjustment of $118 million associated with an adjustment to the goodwill impairment attributed to our contract drilling services reporting unit and a loss of $22 million associated with the impairment of the customer relationships intangible asset related to the U.K. operations of our drilling management services reporting unit. Second quarter included a loss of $756 million associated with loss contingencies related to the Macondo well incident. Third quarter included an aggregate gain of $51 million associated with the sale of Discoverer 534 and Jim Cunningham. See Note 5—Impairments, Note 10—Drilling Fleet and Note 15—Commitments and Contingencies.

(d) First, second, third and fourth quarters included aggregate losses of $93 million, $12 million, $878 million and $3 million, respectively, associated with the impairment of assets of our discontinued operations. First, second, third and fourth quarters included aggregate gains (losses) of $(1) million, $72 million, $(1) million and $12 million, respectively, associated with the disposal of assets of our discontinued operations. See Note 7—Discontinued Operations.