v2.4.0.8

Quarterly Results (Unaudited) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Quarterly Results (Unaudited) |  |  |  |  |  |  |  |  |  |  |
Operating revenues | $ 2,332 | $ 2,558 | $ 2,397 | $ 2,197 | $ 2,326 | $ 2,431 | $ 2,329 | $ 2,110 | $ 9,484 | $ 9,196 | $ 8,027
Operating income (loss) | 407 | 742 | 602 | 473 | 541 | 811 | (142) | 371 | 2,224 | 1,581 | (4,762)
Income (loss) from continuing operations | 228 | 544 | 321 | 313 | 432 | 533 | (303) | 154 | 1,406 | 816 | (5,762)
Net income (loss) | 231 | 544 | 303 | 329 | 457 | (383) | (303) | 18 | 1,407 | (211) | (5,677)
Net income (loss) attributable to controlling interest | 233 | 546 | 307 | 321 | 456 | (381) | (304) | 10 | 1,407 | (219) | (5,754)
Adjustment to original estimate of goodwill |  |  |  |  |  |  |  | 118 |  | 118 | 5,200
Loss associated with the Macondo well incident contingencies |  | 29 |  | 74 |  |  | 756 |  |  |  |
Gains (losses) on disposal of discontinued operations | 5 | 31 | 3 | 15 | 12 | (1) | 72 | (1) |  |  |
Impairment of intangible asset associated with the U.K. operations of drilling management services reporting unit |  |  |  |  |  |  |  |  |  | 22 |
Impairment of certain drilling units classified as held for sale |  |  | 37 |  |  |  |  |  |  |  |
Impairment of assets of discontinued operations |  |  |  |  | 3 | 878 | 12 | 93 |  |  |
Per share earnings (loss) from continuing operations |  |  |  |  |  |  |  |  |  |  |
Basic (in dollars per share) | $ 0.62 | $ 1.49 | $ 0.87 | $ 0.88 | $ 1.19 | $ 1.49 | $ (0.86) | $ 0.42 | $ 3.87 | $ (0.62) | $ (17.88)
Diluted (in dollars per share) | $ 0.62 | $ 1.49 | $ 0.87 | $ 0.88 | $ 1.19 | $ 1.49 | $ (0.86) | $ 0.42 | $ 3.87 | $ (0.62) | $ (17.88)
Weighted-average shares outstanding |  |  |  |  |  |  |  |  |  |  |
Basic: (in shares) | 361 | 361 | 360 | 360 | 359 | 359 | 353 | 350 | 360 | 356 | 322
Diluted: (in shares) | 361 | 361 | 360 | 360 | 360 | 359 | 353 | 350 | 360 | 356 | 322
Quarterly results |  |  |  |  |  |  |  |  |  |  |
Gain on the sale of assets |  |  |  |  |  |  |  |  | 7 | 36 | (12)
Sale of Transocean Richardson |  |  |  |  |  |  |  |  |  |  |
Quarterly results |  |  |  |  |  |  |  |  |  |  |
Gain on the sale of assets |  | $ 33 |  |  |  |  |  |  | $ 33 |  |

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