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Derivative Instruments (Tables) | 12 Months Ended
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Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of derivative instruments measured at fair value and their locations on the consolidated balance sheets | The following table presents the gross fair value of our derivative instruments and their locations on the consolidated balance sheets (in millions):
|  |  | Gross Derivative Assets |  | Gross Derivative Liabilities
|  |  | As of December 31, |  | As of December 31,
Derivative Instruments |  | Balance Sheet Location |  | 2017 |  | 2016 |  |  | 2017 |  | 2016
Derivatives designated as hedging instruments |  |  |  |  |  |  |  |  |
Commodity contracts |  | Short-term derivative assets, net |  | $ | 0.4 |  |  | $ | 2.2 |  |  |  | $ | 0.5 |  |  | $ | 5.4 |
|  | Identifiable intangible and other non-current assets |  | — |  |  | — |  |  |  | — |  |  | — |
|  | Accrued expenses and other current liabilities |  | 2.3 |  |  | 86.0 |  |  |  | 43.1 |  |  | 93.5 |
|  | Other long-term liabilities |  | — |  |  | 5.1 |  |  |  | — |  |  | 10.1 |
Total derivatives designated as hedging instruments |  | $ | 2.7 |  |  | $ | 93.3 |  |  |  | $ | 43.6 |  |  | $ | 108.9 |
Derivatives not designated as hedging instruments |  |  |  |  |  |  |  |  |
Commodity contracts | Short-term derivative assets, net |  | $ | 191.4 |  |  | $ | 160.3 |  |  |  | $ | 123.3 |  |  | $ | 86.7 |
|  | Identifiable intangible and other non-current assets |  | 18.2 |  |  | 17.1 |  |  |  | 5.2 |  |  | 6.2 |
|  | Accrued expenses and other current liabilities |  | 86.1 |  |  | 52.5 |  |  |  | 138.2 |  |  | 112.2 |
|  | Other long-term liabilities |  | 5.2 |  |  | 8.1 |  |  |  | 13.5 |  |  | 12.1 |
|  |  |  | $ | 300.9 |  |  | $ | 238.0 |  |  |  | $ | 280.2 |  |  | $ | 217.2 |
Foreign currency contracts | Short-term derivative assets, net |  | $ | 4.5 |  |  | $ | 13.5 |  |  |  | $ | 2.8 |  |  | $ | 3.4 |
|  | Identifiable intangible and other non-current assets |  | — |  |  | 0.9 |  |  |  | — |  |  | 0.1 |
|  | Accrued expenses and other current liabilities |  | 3.9 |  |  | 1.6 |  |  |  | 5.7 |  |  | 2.8 |
|  | Other long-term liabilities |  | — |  |  |  |  |  | 0.2 |  |  |
|  |  |  | $ | 8.5 |  |  | $ | 16.0 |  |  |  | $ | 8.7 |  |  | $ | 6.4 |
Total derivatives not designated as hedging instruments |  | $ | 309.4 |  |  | $ | 253.9 |  |  |  | $ | 288.9 |  |  | $ | 223.6 |
Total derivatives |  |  |  | $ | 312.0 |  |  | $ | 347.2 |  |  |  | $ | 332.5 |  |  | $ | 332.5 |
Schedule of fair value positions of derivative instruments | The following table summarizes the gross notional values of our commodity and foreign currency exchange derivative contracts used for risk management purposes that were outstanding as of December 31, 2017 (in millions):
| As of December 31,
Derivative Instruments |  | Units |  | 2017
Commodity contracts |  |  |  |
Buy / Long |  | BBL |  | 66.5 |
Sell / Short |  | BBL |  | (75.9 | )
Foreign currency exchange contracts |  |  |  |
Sell U.S. dollar, buy other currencies |  | USD |  | (255.8 | )
Buy U.S. dollar, sell other currencies |  | USD |  | 485.5 |
For additional information about our use of derivative instruments, see Item 7A. Quantitative and Qualitative Disclosures About Market Risk.
Impact of derivatives designated as fair value hedges on the consolidated statements of income and comprehensive income | The following table presents the effect and financial statement location of our derivative instruments and related hedged items in fair value hedging relationships on our consolidated statements of income and comprehensive income (in millions):
Realized and Unrealized Gain (Loss) | For the Year Ended |  | Realized and Unrealized Gain (Loss) | For the Year Ended
|  | December 31, |  |  |  | December 31,
Derivative Instruments | Location |  | 2017 |  | 2016 |  | 2015 |  | Hedged Items | Location |  | 2017 |  | 2016 |  | 2015
Commodity contracts |  |  |  |  |  |  |  |  | Inventories |  |  |  |  |  |  |
| Revenue |  | $ | — |  |  | $ | — |  |  | $ | 49.3 |  |  |  | Revenue |  | $ | — |  |  | $ | — |  |  | $ | — |
| Cost of revenue |  | (35.7 | ) |  | (25.3 | ) |  | 37.5 |  |  |  | Cost of revenue |  | 13.0 |  |  | 10.8 |  |  | (70.7 | )
Total gain (loss) |  | $ | (35.7 | ) |  | $ | (25.3 | ) |  | $ | 86.8 |  |  | Total gain (loss) |  | $ | 13.0 |  |  | $ | 10.8 |  |  | $ | (70.7 | )
Impact of derivatives designated as hedges on the accumulated other comprehensive income and consolidated statements of income and comprehensive income | The following table presents the effect and financial statement location of our derivative instruments in cash flow hedging relationships on our accumulated other comprehensive income and consolidated statements of income and comprehensive income (in millions):
Amount of Gain (Loss) Recognized in Accumulated Other Comprehensive Income (Effective Portion) | For the Year Ended |  | Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Effective Portion) | For the Year Ended
| December 31, |  |  | December 31,
Derivative Instruments |  | 2017 |  | 2016 |  | 2015 |  | Location |  | 2017 |  | 2016 |  | 2015
Commodity contracts |  | $ | (7.8 | ) |  | $ | (145.8 | ) |  | $ | 106.5 |  |  | Revenue |  | $ | (41.3 | ) |  | $ | 18.1 |  |  | $ | 7.2 |
Commodity contracts |  | (0.1 | ) |  | 178.1 |  |  | (105.4 | ) |  | Cost of revenue |  | 33.7 |  |  | 20.8 |  |  | (5.3 | )
Total gain (loss) |  | $ | (7.9 | ) |  | $ | 32.3 |  |  | $ | 1.0 |  |  | Total gain (loss) |  | $ | (7.6 | ) |  | $ | 38.8 |  |  | $ | 1.8 |
Amount of Gain (Loss) Recognized in Income (Ineffective Portion and Amount Excluded from Effectiveness Testing) | For the Year Ended
| December 31,
Location |  | 2017 |  | 2016 |  | 2015
Revenue |  | $ | 0.7 |  |  | $ | (13.7 | ) |  | $ | 28.6 |
Cost of revenue |  | (15.4 | ) |  | 9.4 |  |  | (17.8 | )
Total gain (loss) |  | $ | (14.8 | ) |  | $ | (4.4 | ) |  | $ | 10.8 |
Impact of derivatives not designated as hedges on the consolidated statements of income and comprehensive income | The following table presents the effect and financial statement location of our derivative instruments not designated as hedging instruments on our consolidated statements of income and comprehensive income (in millions):
Amount of Realized and Unrealized Gain (Loss) |  | For the Year Ended
|  | December 31,
Derivative Instruments - Non-designated | Location |  | 2017 |  | 2016 |  | 2015
Commodity contracts |  |  |  |  |  |
| Revenue |  | $ | (0.5 | ) |  | $ | 29.7 |  |  | $ | 171.7 |
| Cost of revenue |  | 62.3 |  |  | (31.6 | ) |  | (139.0 | )
|  |  | $ | 61.8 |  |  | $ | (1.9 | ) |  | $ | 32.7 |
Foreign currency contracts |  |  |  |  |  |
| Revenue |  | $ | (3.2 | ) |  | $ | 10.0 |  |  | $ | 4.1 |
| Other (expense) income, net |  | (7.8 | ) |  | (0.8 | ) |  | 9.5 |
|  |  | $ | (11.0 | ) |  | $ | 9.2 |  |  | $ | 13.6 |
Total gain |  |  | $ | 50.8 |  |  | $ | 7.3 |  |  | $ | 46.3 |
Schedule of potential collateral requirements for derivative liabilities | The following table presents the potential collateral requirements for derivative liabilities with credit-risk-contingent features (in millions):
| Potential Collateral Requirements for Derivative Liabilities with Credit-Risk-Contingent Features
|  |  | As of December 31,
|  |  | 2017 |  |  | 2016
Net derivative liability positions with credit contingent features |  |  | $ | 11.8 |  |  |  | $ | 15.2 |
Maximum potential collateral requirements |  |  | $ | 11.8 |  |  |  | $ | 15.2 |

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- Definition Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=84234895&loc=d3e41641-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624163-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=84234895&loc=d3e41678-113959 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=84234895&loc=d3e41638-113959 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5580258-113959 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579245-113959 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579240-113959 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84234895&loc=d3e41620-113959 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(n)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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