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Supplemental Financial Information (Tables) | 3 Months Ended
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Mar. 31, 2015
Supplemental Financial Information [Abstract] |
Accounts Receivable, Net | Accounts receivable, net, consisted of the following (in millions):
| March 31, 2015 |  | December 31, 2014
Trade | $ | 792.7 |  |  | $ | 878.8 |
Other | 14.0 |  |  | 15.9 |
| 806.7 |  |  | 894.7 |
Allowance for doubtful accounts | (11.3 | ) |  | (11.4 | )
| $ | 795.4 |  |  | $ | 883.3 |
Other Current Assets | Other current assets consisted of the following (in millions):
| March 31, 2015 |  | December 31, 2014
Inventory | $ | 250.4 |  |  | $ | 240.3 |
Assets held for sale | 152.8 |  |  | 152.4 |
Prepaid taxes | 89.0 |  |  | 90.6 |
Deferred costs | 60.7 |  |  | 61.9 |
Deferred tax assets | 43.8 |  |  | 43.8 |
Prepaid expenses | 21.0 |  |  | 33.8 |
Other | 7.6 |  |  | 6.6 |
| $ | 625.3 |  |  | $ | 629.4 |
Other Assets, Net | Other assets, net, consisted of the following (in millions):
| March 31, 2015 |  | December 31, 2014
Deferred costs | $ | 83.6 |  |  | $ | 82.3 |
Supplemental executive retirement plan assets | 43.8 |  |  | 43.2 |
Intangible assets | 40.4 |  |  | 49.0 |
Prepaid taxes on intercompany transfers of property | 39.1 |  |  | 39.7 |
Deferred tax assets | 37.0 |  |  | 38.4 |
Warranty and other claim receivables | 30.6 |  |  | 30.6 |
Unbilled receivables | 4.5 |  |  | 18.6 |
Other | 12.0 |  |  | 12.4 |
| $ | 291.0 |  |  | $ | 314.2 |
Accrued Liabilities And Other | Accrued liabilities and other consisted of the following (in millions):
| March 31, 2015 |  | December 31, 2014
Deferred revenue | $ | 240.5 |  |  | $ | 241.3 |
Personnel costs | 145.5 |  |  | 214.0 |
Taxes | 90.9 |  |  | 97.0 |
Accrued interest | 78.0 |  |  | 83.8 |
Derivative liabilities | 42.3 |  |  | 24.1 |
Other | 28.4 |  |  | 36.4 |
| $ | 625.6 |  |  | $ | 696.6 |
Other Liabilities | Other liabilities consisted of the following (in millions):
| March 31, 2015 |  | December 31, 2014
Deferred revenue | $ | 322.9 |  |  | $ | 373.2 |
Unrecognized tax benefits (inclusive of interest and penalties) | 141.9 |  |  | 142.4 |
Supplemental executive retirement plan liabilities | 45.2 |  |  | 45.1 |
Intangible liabilities | 33.7 |  |  | 40.7 |
Personnel costs | 13.7 |  |  | 26.1 |
Other | 38.7 |  |  | 39.8 |
| $ | 596.1 |  |  | $ | 667.3 |
Accumulated other comprehensive income | Accumulated other comprehensive income consisted of the following (in millions):
| March 31, 2015 |  | December 31, 2014
Derivative Instruments | $ | (4.4 | ) |  | $ | 8.0 |
Other | 6.5 |  |  | 3.9 |
| $ | 2.1 |  |  | $ | 11.9 |
Schedule of Revenue by Major Customers by Reporting Segments [Table Text Block] | Consolidated revenues by customer for the quarters ended March 31, 2015 and 2014 were as follows:
| March 31, 2015 |  | March 31, 2014
BP (1) | 13 | % |  | 17 | %
Petrobras(2) | 11 | % |  | 10 | %
Total(2) | 8 | % |  | 12 | %
Anadarko(2) | 6 | % |  | 11 | %
Other | 62 | % |  | 50 | %
| 100 | % |  | 100 | %
(1) | During the quarters ended March 31, 2015 and 2014, 85% and 80% of the revenues provided by BP, respectively, were attributable to our Floaters segment.
(2) | During the quarters ended March 31, 2015 and 2014, all revenues were provided by our Floaters segment.
Revenue from External Customers by Geographic Areas [Table Text Block] | Consolidated revenues by region for the quarters ended March 31, 2015 and 2014 were as follows:
| March 31, 2015 |  | March 31, 2014
U.S. Gulf of Mexico(1) | $ | 338.8 |  |  | $ | 408.8 |
Angola(2) | 169.3 |  |  | 150.6 |
Brazil(3) | 122.7 |  |  | 134.5 |
United Kingdom(4) | 120.6 |  |  | 64.8 |
Other | 412.5 |  |  | 308.0 |
| $ | 1,163.9 |  |  | $ | 1,066.7 |
(1) | During the quarters ended March 31, 2015 and 2014, 84% and 77% of the revenues earned in the U.S. Gulf of Mexico, respectively, were attributable to our Floaters segment.
(2) | During the quarters ended March 31, 2015 and 2014, 90% and 100% of the revenues earned in Angola, respectively, were attributable to our Floaters segment.
(3) | During the quarters ended March 31, 2015 and 2014, all revenues were provided by our Floaters segment.
(4) | During the quarters ended March 31, 2015 and 2014, all revenues were provided by our Jackups segment.

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