Income Tax Examination, Number of Years Under Review

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- Definition

Income Tax Examination, Settlement Agreement, Number of Tax Years

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- Definition

Number of Subsidiaries Involved in Loss Contingency

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- Definition

Oil and Gas Contingencies, Number of Barrels Spilled

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to income tax settlements. Including, but not limited to, domestic tax settlement, foreign tax settlement, state and local tax settlement, and other tax settlements.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 13

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319

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The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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Amount charged against operating income increasing loss contingency liability, after adjustments to reduce previously estimated charges.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 450

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Commitments and Contingent Liabilities (Details) $ in Millions		1 Months Ended		3 Months Ended		9 Months Ended
	Mar. 22, 2015 bbl	Sep. 30, 2014 USD ($)	Nov. 30, 2013 subsidiary	Sep. 30, 2015 USD ($)	Jun. 30, 2015 USD ($)	Sep. 30, 2015 USD ($)
Oil and Gas Delivery Commitments and Contracts [Line Items]
Settlement agreement, number of years		3 years
Number of years under review		4 years
Number of barrels spilled \| bbl	2,200
Outstanding letters of credit				$ 11.0		$ 11.0
HS Ocean Group Ltd. [Member] \| Loss on Purchase Contract [Member]
Oil and Gas Delivery Commitments and Contracts [Line Items]
Number of subsidiaries involved in loss contingency \| subsidiary			1
Increase in estimated liability				$ 2.6	$ 5.0	$ 7.6
Current Income Tax Receivable [Member]
Oil and Gas Delivery Commitments and Contracts [Line Items]
Tax benefits recognized from settlement		$ 36.0