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Retirement Benefits (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
ETP [Member]
Retirement Benefits [Line Items]
Defined Contribution Plan, Cost Recognized	$ 44	$ 40	$ 50
Sunoco [Member]
Retirement Benefits [Line Items]
Other Postretirement Defined Benefit Plan, Liabilities, Noncurrent	$ 200
Pension Benefits
Retirement Benefits [Line Items]
Large Cap US Equitiies	100.00%	100.00%
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months	$ 12
Other Postretirement Benefits (Gross, Before Medicare Part D) [Member]
Retirement Benefits [Line Items]
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months	$ 26
Other Postretirement Benefits
Retirement Benefits [Line Items]
Large Cap US Equitiies	31.00%	56.00%
Fixed Income Securities	66.00%	33.00%
Cash Fund Investments	3.00%	11.00%
Defined Benefit Plan, Expected Future Benefit Payments, Next Twelve Months	$ 10
Other Postretirement Benefits | Equity [Member]
Retirement Benefits [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum	25.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum	35.00%
Other Postretirement Benefits | Fixed Income Investments [Member]
Retirement Benefits [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum	65.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum	75.00%
Other Postretirement Benefits | Cash [Member]
Retirement Benefits [Line Items]
Defined Benefit Plan, Target Allocation Percentage, Cash Maximum	10.00%

X

- Definition

Percentage of mutual fund that is invested in cash.

+ References

No definition available.

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- Definition

Target allocation maximum percentage of investments in cash securities to total plan assets presented on a weighted-average basis as of the measurement date of the latest statement of financial position.

+ References

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X

- Definition

Percentage of mutual fund that is invested in fixed income securities.

+ References

No definition available.

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- Definition

Percentage of mutual fund that is invested in large-cap U.S. equities.

+ References

No definition available.

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- Definition

Retirement Benefits [Line Items]

+ References

No definition available.

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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

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=65897934&loc=d3e1928-114920

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- Definition

Target allocation maximum percentage of investments of this type to total plan assets presented on a weighted average basis.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 5
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- Definition

Target allocation minimum percentage of investments of this type to total plan assets presented on a weighted average basis.

+ References

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-Name Accounting Standards Codification
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- Definition

The amount of the cost recognized during the period for defined contribution plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942

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- Definition

This represents the noncurrent liability recognized in the balance sheet that is associated with other postretirement defined benefit plans (excluding pension plans).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
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