v2.4.0.8

Pension Plans and Postretirement Benefits (Information On Our Pension Benefit Plans) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended			11 Months Ended	12 Months Ended														12 Months Ended			11 Months Ended	12 Months Ended
	Dec. 31, 2013 Pension Benefits [Member]	Dec. 31, 2012 Pension Benefits [Member]	Dec. 31, 2011 Pension Benefits [Member]	Dec. 31, 2011 Pension Benefits [Member] NBCUniversal Media, LLC [Member]	Dec. 31, 2013 Pension Benefits [Member] NBCUniversal Media, LLC [Member]	Dec. 31, 2012 Pension Benefits [Member] NBCUniversal Media, LLC [Member]	Dec. 31, 2013 Pension Benefits [Member] Minimum [Member]	Dec. 31, 2012 Pension Benefits [Member] Minimum [Member]	Dec. 31, 2011 Pension Benefits [Member] Minimum [Member]	Dec. 31, 2013 Pension Benefits [Member] Minimum [Member] NBCUniversal Media, LLC [Member]	Dec. 31, 2012 Pension Benefits [Member] Minimum [Member] NBCUniversal Media, LLC [Member]	Dec. 31, 2011 Pension Benefits [Member] Minimum [Member] NBCUniversal Media, LLC [Member]	Dec. 31, 2013 Pension Benefits [Member] Maximum [Member]	Dec. 31, 2012 Pension Benefits [Member] Maximum [Member]	Dec. 31, 2011 Pension Benefits [Member] Maximum [Member]	Dec. 31, 2013 Pension Benefits [Member] Maximum [Member] NBCUniversal Media, LLC [Member]	Dec. 31, 2012 Pension Benefits [Member] Maximum [Member] NBCUniversal Media, LLC [Member]	Dec. 31, 2011 Pension Benefits [Member] Maximum [Member] NBCUniversal Media, LLC [Member]	Dec. 31, 2013 Postretirement Benefits [Member]	Dec. 31, 2012 Postretirement Benefits [Member]	Dec. 31, 2011 Postretirement Benefits [Member]	Dec. 31, 2011 Postretirement Benefits [Member] NBCUniversal Media, LLC [Member]	Dec. 31, 2013 Postretirement Benefits [Member] NBCUniversal Media, LLC [Member]	Dec. 31, 2012 Postretirement Benefits [Member] NBCUniversal Media, LLC [Member]	Dec. 31, 2013 Postretirement Benefits [Member] Minimum [Member]	Dec. 31, 2013 Postretirement Benefits [Member] Maximum [Member]
Benefit obligation	$ 498	$ 805	$ 638	$ 427	$ 498	$ 546													$ 633	$ 703	$ 618	$ 161	$ 158	$ 177
Fair value of plan assets	220	403	176		220	217
Plan funded status and recorded benefit obligation	(278)	(402)	(462)	(427)	(278)	(329)													(633)	(703)	(618)	(161)	(158)	(177)
Portion of benefit obligation not yet recognized in benefits expense	(3)	151	137	71	(3)	53													(110)	17	(17)	(13)	(44)	(11)
Benefits expense	$ 12	$ 163	$ 117	$ 111	$ 12	$ 142													$ 65	$ 60	$ 47	$ 14	$ 14	$ 15
Discount rate							4.50%	3.25%	4.75%	4.50%	3.75%	4.75%	5.25%	4.25%	5.25%	5.25%	4.25%	5.25%		4.25%	4.75%	4.75%	5.25%	4.25%	5.00%	5.25%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	5.00%	5.00%	6.50%		5.00%	5.00%

X

- Definition

The pretax total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.

+ 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 (j)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 220

-SubTopic 10

-Section 45

-Paragraph 10A

-Subparagraph (i-k)

-URI http://asc.fasb.org/extlink&oid=28358780&loc=SL7669646-108580

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- Definition

The interest rate used to adjust for the time value of money for the plan.

+ 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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- Definition

An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Glossary Expected Long-Term Rate of Return on Plan Assets

-URI http://asc.fasb.org/extlink&oid=6512013



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X

- Definition

1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. 2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular 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 (a)

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Projected Benefit Obligation

-URI http://asc.fasb.org/extlink&oid=6522206



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Accumulated Postretirement Benefit Obligation

-URI http://asc.fasb.org/extlink&oid=6503904

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- Definition

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

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- Definition

The funded status is measured as the difference between the fair value of plan assets and the benefit obligation. Will normally be the same as the net Defined Benefit Plan, Amounts Recognized in Balance Sheet, Total.

+ References

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

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- Definition

The amount of pension and other (such as medical, dental and life insurance) postretirement benefit costs recognized during the period for (1) defined benefit plans (periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss) on assets, prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments) and for (2) defined contribution plans (to the extent that a plan's defined contributions to an individual's account are to be made for periods in which that individual renders services, the net cost for a period is the contribution called for in that period; if a plan calls for contributions for periods after an individual retires or terminates, the estimated cost is accrued during the employee's service period).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

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-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

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-Subparagraph (SX 210.5-03.4)

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