XML 80 R63.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Equity, Income Tax Effects on Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Other Comprehensive Income (Loss), before Tax |  |  |  |
Other comprehensive income (loss) before income tax expense (benefit) |  | $ 449 | $ (513) | $ (549)
Other Comprehensive Income (Loss), Tax |  |  |  |
Income tax expense (benefit) related to items of other comprehensive income (loss) |  | (21) | (37) | 17
Other Comprehensive Income (Loss), Net of Tax |  |  |  |
Reclassification from accumulated other comprehensive income (loss), current period, net of tax |  | 12 | 7 | 19
Other comprehensive income (loss) |  | 470 | (476) | (566)
Foreign Currency Translation Adjustment [Member] |  |  |  |
Other Comprehensive Income (Loss), before Tax |  |  |  |
Other comprehensive income (loss), before reclassifications, before tax |  | 514 | (415) | (606)
Other Comprehensive Income (Loss), Tax |  |  |  |
Other comprehensive income (loss), before reclassifications, tax expense (benefit) |  | 0 | 0 | 0
Other Comprehensive Income (Loss), Net of Tax |  |  |  |
Other comprehensive income (loss), before reclassifications, net of tax |  | 514 | (415) | (606)
Net Actuarial Gain (Loss) [Member] |  |  |  |
Other Comprehensive Income (Loss), before Tax |  |  |  |
Other comprehensive income (loss), before reclassifications, before tax |  | (79) | (110) | 50
Reclassification from accumulated other comprehensive income (loss), current period, before tax | [1] | 50 | 48 | 62
Other Comprehensive Income (Loss), Tax |  |  |  |
Other comprehensive income (loss), before reclassifications, tax expense (benefit) |  | (29) | (34) | 15
Reclassification from accumulated other comprehensive income (loss), current period, tax expense (benefit) |  | 18 | 18 | 22
Other Comprehensive Income (Loss), Net of Tax |  |  |  |
Other comprehensive income (loss), before reclassifications, net of tax |  | (50) | (76) | 35
Reclassification from accumulated other comprehensive income (loss), current period, net of tax |  | 32 | 30 | 40
Prior Service (Cost) Credit [Member] |  |  |  |
Other Comprehensive Income (Loss), before Tax |  |  |  |
Other comprehensive income (loss), before reclassifications, before tax |  | (4) |  | (22)
Reclassification from accumulated other comprehensive income (loss), current period, before tax | [1] | (36) | (36) | (40)
Other Comprehensive Income (Loss), Tax |  |  |  |
Other comprehensive income (loss), before reclassifications, tax expense (benefit) |  | (1) |  | (8)
Reclassification from accumulated other comprehensive income (loss), current period, tax expense (benefit) |  | (13) | (13) | (14)
Other Comprehensive Income (Loss), Net of Tax |  |  |  |
Other comprehensive income (loss), before reclassifications, net of tax |  | (3) |  | (14)
Reclassification from accumulated other comprehensive income (loss), current period, net of tax |  | (23) | (23) | (26)
Miscellaneous Gain (Loss) [Member] |  |  |  |
Other Comprehensive Income (Loss), before Tax |  |  |  |
Other comprehensive income (loss), before reclassifications, before tax |  | 0 | 0 |
Other Comprehensive Income (Loss), Tax |  |  |  |
Other comprehensive income (loss), before reclassifications, tax expense (benefit) |  | 3 | (8) |
Other Comprehensive Income (Loss), Net of Tax |  |  |  |
Other comprehensive income (loss), before reclassifications, net of tax |  | (3) | 8 |
Curtailment and Settlement Loss [Member] |  |  |  |
Other Comprehensive Income (Loss), before Tax |  |  |  |
Reclassification from accumulated other comprehensive income (loss), current period, before tax | [1] | 4 | 0 | 7
Other Comprehensive Income (Loss), Tax |  |  |  |
Reclassification from accumulated other comprehensive income (loss), current period, tax expense (benefit) |  | 1 |  | 2
Other Comprehensive Income (Loss), Net of Tax |  |  |  |
Reclassification from accumulated other comprehensive income (loss), current period, net of tax |  | 3 |  | 5
Net Gain (Loss) on Pension and Other Postretirement Benefits [Member] |  |  |  |
Other Comprehensive Income (Loss), before Tax |  |  |  |
Reclassification from accumulated other comprehensive income (loss), current period, before tax |  | 18 | 12 | 29
Other comprehensive income (loss) before income tax expense (benefit) |  | (65) | (98) | 57
Other Comprehensive Income (Loss), Tax |  |  |  |
Reclassification from accumulated other comprehensive income (loss), current period, tax expense (benefit) |  | 6 | 5 | 10
Income tax expense (benefit) related to items of other comprehensive income (loss) |  | (21) | (37) | 17
Other Comprehensive Income (Loss), Net of Tax |  |  |  |
Other comprehensive income (loss) |  | $ (44) | $ (61) | $ 40
[1] | These accumulated other comprehensive loss components are included in the computation of net periodic benefit cost, as further discussed in Note 12. Net periodic benefit cost is reflected in operating expenses (excluding depreciation and amortization expense) and general and administrative expenses (excluding depreciation and amortization expense).

X
- Definition Amount before tax and reclassification adjustments of other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
Name: | us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount after tax, before reclassification adjustments of other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=84158357&loc=d3e1436-108581 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
Name: | us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of tax expense (benefit) allocated to other comprehensive income (loss) before reclassification adjustment from accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 11 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=79507043&loc=d3e39076-109324 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e640-108580 + Details
Name: | us-gaap_OtherComprehensiveIncomeLossBeforeReclassificationsTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount before tax, after reclassification adjustments of other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669625-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -SubTopic 10 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=66022249&loc=d3e33775-111570 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669619-108580 + Details
Name: | us-gaap_OtherComprehensiveIncomeLossBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_OtherComprehensiveIncomeLossBeforeTaxPeriodIncreaseDecreaseAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount after tax and reclassification adjustments of other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21463-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669619-108580 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669625-108580 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=84158357&loc=d3e1436-108581 + Details
Name: | us-gaap_OtherComprehensiveIncomeLossNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecreaseAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of tax expense (benefit) allocated to other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e640-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 11 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=79507043&loc=d3e39076-109324 + Details
Name: | us-gaap_OtherComprehensiveIncomeLossTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_OtherComprehensiveIncomeLossTaxAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount before tax of reclassification adjustments of other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 + Details
Name: | us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount after tax of reclassification adjustments of other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=84228862&loc=SL7669686-108580 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 55 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=84158357&loc=d3e1436-108581 + Details
Name: | us-gaap_ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 20 -Section 45 -Paragraph 11 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=79507043&loc=d3e39076-109324 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84228862&loc=d3e640-108580 + Details
Name: | us-gaap_ReclassificationFromAociCurrentPeriodTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_AccumulatedForeignCurrencyAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetGainLossIncludingPortionAttributableToNoncontrollingInterestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_AccumulatedDefinedBenefitPlansAdjustmentNetPriorServiceIncludingPortionAttributableToNoncontrollingInterestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=vlo_AccumulatedDefinedBenefitPlansAdjustmentMiscellaneousGainLossIncludingPortionAttributabletoNoncontrollingInterestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=vlo_AccumulatedDefinedBenefitPlansAdjustmentCurtailmentandSettlementIncludingPortionAttributabletoNoncontrollingInterestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_AccumulatedDefinedBenefitPlansAdjustmentIncludingPortionAttributableToNoncontrollingInterestMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |