EMPLOYEE BENEFIT PLANS - FUTURE BENEFITS EXPECTED TO BE PAID (DETAILS) (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014
Qualified Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
2015	$ 78
2016	86
2017	93
2018	93
2019	104
2020 - 2024	600
Nonqualified Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Anticipated funding in next fiscal year	4
Postretirement Medical Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Anticipated funding in next fiscal year	4
2015	4
2016	4
2017	5
2018	5
2019	5
2020 - 2024	28
Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Anticipated funding in next fiscal year	30
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Anticipated funding in next fiscal year	$ 35

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Amount of benefits from a defined benefit plan expected to be paid in the five fiscal years after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (f)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920

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- Definition

Amount of benefits from a defined benefit plan expected to be paid in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

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Amount of benefits from a defined benefit plan expected to be paid in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

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Amount of benefits from a defined benefit plan expected to be paid in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

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- Definition

Amount of benefits from a defined benefit plan expected to be paid in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

+ Details

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Amount of benefits from a defined benefit plan expected to be paid in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

+ References

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- Definition

Amount of employer's best estimate of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920

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