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Accumulated Other Comprehensive Loss - Tax Impact (Detail) $ in Millions | 3 Months Ended
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Mar. 31, 2018 USD ($)
Derivative Instruments [Member] |
Accumulated Other Comprehensive Income (Loss) [Line Items] |
Other comprehensive income (loss) before reclassifications, tax | $ 0
Amounts reclassified from accumulated other comprehensive (income) loss, tax | 1
Available for sale Securities [Member] |
Accumulated Other Comprehensive Income (Loss) [Line Items] |
Other comprehensive income (loss) before reclassifications, tax | 0
Amounts reclassified from accumulated other comprehensive (income) loss, tax | 0
Foreign Currency Translation Adjustments [Member] |
Accumulated Other Comprehensive Income (Loss) [Line Items] |
Other comprehensive income (loss) before reclassifications, tax | 0
Amounts reclassified from accumulated other comprehensive (income) loss, tax | 0
Post - Retirement Benefit Obligation [Member] |
Accumulated Other Comprehensive Income (Loss) [Line Items] |
Other comprehensive income (loss) before reclassifications, tax | 0
Amounts reclassified from accumulated other comprehensive (income) loss, tax | $ 0

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- 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
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