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Supplemental Financial Information | 6 Months Ended
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Jun. 30, 2015
Supplemental Financial Information [Abstract] |
Supplemental Financial Information | Supplemental Financial Information Consolidated Balance Sheet Information Accounts receivable, net, consisted of the following (in millions):
| June 30, 2015 |  | December 31, 2014
Trade | $ | 709.9 |  |  | $ | 878.8 |
Other | 19.8 |  |  | 15.9 |
| 729.7 |  |  | 894.7 |
Allowance for doubtful accounts | (15.3 | ) |  | (11.4 | )
| $ | 714.4 |  |  | $ | 883.3 |
Other current assets consisted of the following (in millions):
| June 30, 2015 |  | December 31, 2014
Inventory | $ | 251.7 |  |  | $ | 240.3 |
Assets held for sale | 145.7 |  |  | 152.4 |
Prepaid taxes | 79.0 |  |  | 90.6 |
Deferred costs | 60.5 |  |  | 61.9 |
Deferred tax assets | 43.9 |  |  | 43.8 |
Prepaid expenses | 35.1 |  |  | 33.8 |
Other | 12.0 |  |  | 6.6 |
| $ | 627.9 |  |  | $ | 629.4 |
Other assets, net consisted of the following (in millions):
| June 30, 2015 |  | December 31, 2014
Deferred costs | $ | 86.9 |  |  | $ | 82.3 |
Supplemental executive retirement plan assets | 44.8 |  |  | 43.2 |
Prepaid taxes on intercompany transfers of property | 38.4 |  |  | 39.7 |
Deferred tax assets | 36.8 |  |  | 38.4 |
Intangible assets | 31.7 |  |  | 49.0 |
Unbilled receivables | 1.7 |  |  | 18.6 |
Warranty and other claim receivables | — |  |  | 30.6 |
Other | 11.2 |  |  | 12.4 |
| $ | 251.5 |  |  | $ | 314.2 |
Accrued liabilities and other consisted of the following (in millions):
| June 30, 2015 |  | December 31, 2014
Deferred revenue | $ | 218.2 |  |  | $ | 241.3 |
Personnel costs | 143.9 |  |  | 214.0 |
Taxes | 98.6 |  |  | 97.0 |
Accrued interest | 89.7 |  |  | 83.8 |
Derivative liabilities | 20.0 |  |  | 24.1 |
Other | 24.6 |  |  | 36.4 |
| $ | 595.0 |  |  | $ | 696.6 |
Other liabilities consisted of the following (in millions):
| June 30, 2015 |  | December 31, 2014
Deferred revenue | $ | 265.8 |  |  | $ | 373.2 |
Unrecognized tax benefits (inclusive of interest and penalties) | 143.8 |  |  | 142.4 |
Supplemental executive retirement plan liabilities | 46.3 |  |  | 45.1 |
Intangible liabilities | 21.2 |  |  | 40.7 |
Personnel costs | 15.3 |  |  | 26.1 |
Other | 34.2 |  |  | 39.8 |
| $ | 526.6 |  |  | $ | 667.3 |
Accumulated other comprehensive income consisted of the following (in millions):
| June 30, 2015 |  | December 31, 2014
Derivative Instruments | $ | 9.4 |  |  | $ | 8.0 |
Other | 5.2 |  |  | 3.9 |
| $ | 14.6 |  |  | $ | 11.9 |
Concentration of Risk We are exposed to credit risk relating to our receivables from customers, our cash and cash equivalents, our short-term investments and our use of derivatives in connection with the management of foreign currency exchange rate risk. We mitigate our credit risk relating to receivables from customers, which consist primarily of major international, government-owned and independent oil and gas companies, by performing ongoing credit evaluations. We also maintain reserves for potential credit losses, which generally have been within management's expectations. We mitigate our credit risk relating to cash and cash equivalents by focusing on diversification and quality of instruments. Cash equivalents consist of a portfolio of high-grade instruments. Custody of cash and cash equivalents is maintained at several well-capitalized financial institutions, and we monitor the financial condition of those financial institutions. We mitigate our credit risk relating to derivative counterparties through a variety of techniques, including transacting with multiple, high-quality financial institutions, thereby limiting our exposure to individual counterparties and by entering into International Swaps and Derivatives Association, Inc. (“ISDA”) Master Agreements, which include provisions for a legally enforceable master netting agreement, with almost all of our derivative counterparties. The terms of the ISDA agreements may also include credit support requirements, cross default provisions, termination events or set-off provisions. Legally enforceable master netting agreements reduce credit risk by providing protection in bankruptcy in certain circumstances and generally permitting the closeout and netting of transactions with the same counterparty upon the occurrence of certain events. See "Note 3 - Derivative Instruments" for additional information on our derivatives. Consolidated revenues by customer for the three-month and six-month periods ended June 30, 2015 and 2014 were as follows:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2015 |  | 2014 |  | 2015 |  | 2014
BP (1) | 16 | % |  | 17 | % |  | 14 | % |  | 17 | %
Petrobras(2) | 15 | % |  | 10 | % |  | 13 | % |  | 10 | %
Total(2) | 10 | % |  | 8 | % |  | 9 | % |  | 10 | %
Anadarko(2) | 5 | % |  | 10 | % |  | 5 | % |  | 11 | %
Other | 54 | % |  | 55 | % |  | 59 | % |  | 52 | %
| 100 | % |  | 100 | % |  | 100 | % |  | 100 | %
(1) | During the three-month periods ended June 30, 2015 and 2014, 79% and 81% of the revenues provided by BP, respectively, were attributable to our Floaters segment. During the six-month period ended June 30, 2015 and 2014, 82% and 80% of the revenues provided by BP, respectively, were attributable to our Floaters segment.
(2) | During the three-month and six-month periods ended June 30, 2015 and 2014, all revenues were provided by our Floaters segment.
Consolidated revenues by region for the three-month and six-month periods ended June 30, 2015 and 2014 were as follows:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2015 |  | 2014 |  | 2015 |  | 2014
U.S. Gulf of Mexico(1) | $ | 271.0 |  |  | $ | 464.7 |  |  | $ | 609.8 |  |  | $ | 873.5 |
Angola(2) | 182.4 |  |  | 157.8 |  |  | 351.7 |  |  | 308.4 |
Brazil(3) | 115.7 |  |  | 111.2 |  |  | 238.4 |  |  | 245.7 |
United Kingdom(4) | 104.3 |  |  | 86.1 |  |  | 224.9 |  |  | 150.9 |
Other | 385.6 |  |  | 316.8 |  |  | 798.1 |  |  | 624.8 |
| $ | 1,059.0 |  |  | $ | 1,136.6 |  |  | $ | 2,222.9 |  |  | $ | 2,203.3 |
(1) | During the three-month period ended June 30, 2015 and 2014, 83% and 77% of the revenues earned in the U.S. Gulf of Mexico, respectively, were attributable to our Floaters segment. During the six-month period ended June 30, 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 three-month period ended June 30, 2015 and 2014, 91% and 100% of the revenues earned in Angola, respectively, were attributable to our Floaters segment. During the six-month period ended June 30, 2015 and 2014, 90% and 100% of the revenues earned in Angola, respectively, were attributable to our Floaters segment.
(3) | During the three-month and six-month periods ended June 30, 2015 and 2014, all revenues were provided by our Floaters segment.
(4) | During the three-month and six-month periods ended June 30, 2015 and 2014, all revenues were provided by our Jackups segment.

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