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Supplemental Financial Information (Tables) | 6 Months Ended
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Jun. 30, 2018
Supplemental Financial Information [Abstract] |
Accounts Receivable, Net | Accounts receivable, net, consisted of the following (in millions):
| June 30, 2018 |  | December 31, 2017
Trade | $ | 338.6 |  |  | $ | 335.4 |
Other | 15.1 |  |  | 33.6 |
| 353.7 |  |  | 369.0 |
Allowance for doubtful accounts | (21.0 | ) |  | (23.6 | )
| $ | 332.7 |  |  | $ | 345.4 |
Other Current Assets | Other current assets consisted of the following (in millions):
| June 30, 2018 |  | December 31, 2017
Inventory | $ | 274.8 |  |  | $ | 278.8 |
Prepaid taxes | 44.7 |  |  | 43.5 |
Deferred costs | 38.2 |  |  | 29.7 |
Prepaid expenses | 13.3 |  |  | 14.2 |
Assets held-for-sale | 3.4 |  |  | 1.5 |
Derivative asset | 1.3 |  |  | 6.8 |
Other | 13.9 |  |  | 6.7 |
| $ | 389.6 |  |  | $ | 381.2 |
Other Assets, Net | Other assets consisted of the following (in millions):
| June 30, 2018 |  | December 31, 2017
Supplemental executive retirement plan assets | $ | 30.5 |  |  | $ | 30.9 |
Deferred costs | 24.8 |  |  | 37.4 |
Deferred tax assets | 15.5 |  |  | 38.8 |
Intangible assets | 8.2 |  |  | 15.7 |
Other | 14.9 |  |  | 17.4 |
| $ | 93.9 |  |  | $ | 140.2 |
Accrued Liabilities And Other | Accrued liabilities and other consisted of the following (in millions):
| June 30, 2018 |  | December 31, 2017
Accrued interest | $ | 101.6 |  |  | $ | 83.1 |
Personnel costs | 81.7 |  |  | 112.0 |
Deferred revenue | 76.6 |  |  | 71.9 |
Taxes | 50.8 |  |  | 46.4 |
Derivative liabilities | 6.7 |  |  | 0.4 |
Other | 14.1 |  |  | 12.1 |
| $ | 331.5 |  |  | $ | 325.9 |
Other Liabilities | Other liabilities consisted of the following (in millions):
| June 30, 2018 |  | December 31, 2017
Unrecognized tax benefits (inclusive of interest and penalties) | $ | 180.7 |  |  | $ | 178.0 |
Intangible liabilities | 55.1 |  |  | 59.6 |
Supplemental executive retirement plan liabilities | 31.5 |  |  | 32.0 |
Personnel costs | 24.1 |  |  | 18.1 |
Deferred revenue | 23.2 |  |  | 51.2 |
Deferred tax liabilities | 16.3 |  |  | 18.5 |
Deferred rent | 13.0 |  |  | 17.1 |
Other | 18.1 |  |  | 12.2 |
| $ | 362.0 |  |  | $ | 386.7 |
Accumulated other comprehensive income | Accumulated other comprehensive income consisted of the following (in millions):
| June 30, 2018 |  | December 31, 2017
Derivative instruments | $ | 14.7 |  |  | $ | 22.5 |
Currency translation adjustment | 7.5 |  |  | 7.8 |
Other | (1.7 | ) |  | (1.7 | )
| $ | 20.5 |  |  | $ | 28.6 |
Schedule of Revenue by Major Customers by Reporting Segments | Consolidated revenues by customer for the three-month and six-month periods ended June 30, 2018 and 2017 were as follows:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Total(1) | 13 | % |  | 22 | % |  | 14 | % |  | 22 | %
Petrobras(1) | 10 | % |  | 11 | % |  | 11 | % |  | 10 | %
BP(2) | 5 | % |  | 15 | % |  | 8 | % |  | 15 | %
Other | 72 | % |  | 52 | % |  | 67 | % |  | 53 | %
| 100 | % |  | 100 | % |  | 100 | % |  | 100 | %
(1) | During the three-month and six-month periods ended June 30, 2018 and 2017, all revenues were attributable to our Floaters segment.
(2) | During the three-month periods ended June 30, 2018 and 2017, 28% of the revenues provided by BP were attributable to our Jackups segment and 79% were attributable to our Floaters segment, respectively, and the remaining revenues were attributable to our Other segment. During the six-month period ended June 30, 2018, 43% of the revenues provided by BP were attributable to our Floaters segment, 15% of the revenues were attributable to our Jackups segment and the remaining revenues were attributable to our Other segment. During the six-month period ended June 30, 2017, 79% of the revenues provided by BP were attributable to our Floaters segment and the remaining revenues were attributable to our Other segment.
Revenue from External Customers by Geographic Areas | Consolidated revenues by region for the three-month and six-month periods ended June 30, 2018 and 2017 were as follows:
| Three Months Ended June 30, |  | Six Months Ended June 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Australia(1) | $ | 80.4 |  |  | $ | 55.3 |  |  | $ | 132.6 |  |  | $ | 109.9 |
Angola(2) | 72.2 |  |  | 115.9 |  |  | 133.3 |  |  | 237.6 |
U.S. Gulf of Mexico(3) | 59.5 |  |  | 33.0 |  |  | 113.1 |  |  | 77.3 |
United Kingdom(4) | 53.7 |  |  | 36.7 |  |  | 100.3 |  |  | 67.9 |
Brazil(5) | 46.1 |  |  | 48.7 |  |  | 96.4 |  |  | 96.5 |
Egypt(5) | — |  |  | 53.4 |  |  | 31.2 |  |  | 106.6 |
Other | 146.6 |  |  | 114.5 |  |  | 268.6 |  |  | 232.8 |
| $ | 458.5 |  |  | $ | 457.5 |  |  | $ | 875.5 |  |  | $ | 928.6 |
(1) | During the three-month periods ended June 30, 2018 and 2017, 95% and 78% of the revenues earned in Australia, respectively, were attributable to our Floaters segment, and the remaining revenues were attributable to our Jackups segment. During the six-month periods ended June 30, 2018 and 2017, 97% and 78% of the revenues earned in Australia, respectively, were attributable to our Floaters segment, and the remaining revenues were attributable to our Jackups segment.
(2) | During the three-month periods ended June 30, 2018 and 2017, 84% and 87% of the revenues earned in Angola, respectively, were attributable to our Floaters segment, and the remaining revenues were attributable to our Jackups segment. During the six-month periods ended June 30, 2018 and 2017, 90% and 86% of the revenues earned in Angola, respectively, were attributable to our Floaters segment, and the remaining revenues were attributable to our Jackups segment.
(3) | During the three-month period ended June 30, 2018, 36% of the revenues earned in the U.S. Gulf of Mexico, were attributable to our Floaters segment, 39% were attributable to our Jackups segment, and the remaining revenues were attributable to our Other segment. During the three-month period ended June 30, 2017, 10% of the revenues earned in the U.S. Gulf of Mexico were attributable to our Floaters segment, 46% were attributable to our Jackups segment and the remaining revenues were attributable to our Other segment. During the six-month period ended June 30, 2018, both the Jackups and Floaters segments earned 37% of revenues in the U.S. Gulf of Mexico and the remaining revenues were attributable to our Other segment. During the six-month period ended June 30, 2017, 37% and 25% of the revenues earned in the U.S. Gulf of Mexico were attributable to our Jackups segment and Floaters segment, respectively, and the remaining revenues were attributable to our Other segment.
(4) | During the three-month and six-month periods ended June 30, 2018 and 2017, all revenues earned in the United Kingdom were attributable to our Jackups segment.
(5) | During the three-month and six-month periods ended June 30, 2018 and 2017, all revenues earned in Brazil and Egypt were attributable to our Floaters segment.

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