Benefits - Plans With ABO in Excess of Plan Assets (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012 Successor [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2012 Successor [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]	Dec. 31, 2011 Predecessor [Member] Pension Plans, Defined Benefit [Member]	Dec. 31, 2011 Predecessor [Member] Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Projected Benefit Obligation	$ 243		$ 225
Accumulated Benefit Obligation	228	13	212	104
Fair Value of Plan Assets	$ 155	$ 0	$ 133	$ 76

If aggregate disclosures are presented, the aggregate pension accumulated benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

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If aggregate disclosures are presented, the aggregate fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

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- Definition

If aggregate disclosures are presented, the aggregate projected benefit obligation for pension plans with accumulated benefit obligations in excess of plan assets as of the measurement date of each statement of financial position presented.

+ References+ Details