Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2012

Defined Benefit Plan Disclosure [Line Items]

Fair Value Hierarchy By Assets and Liabilities Measured At Fair Value On A Recurring Basis [Table Text Block]

The fair value hierarchy for assets and liabilities measured at fair value on a recurring basis are as follows.

	December 31, 2012
	(Dollars in Millions)
Asset Category	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Retirement plan assets	$	309	$	559	$	502	$	1,370
Foreign currency instruments	—		22		—		22
Liability Category
Foreign currency instruments	$	—	$	1	$	—	$	1

	December 31, 2011
	(Dollars in Millions)
Asset Category	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
Retirement plan assets	$	474	$	560	$	466	$	1,500
Liability Category
Foreign currency instruments	$	—	$	16	$	—	$	16

United States Pension Plans of US Entity, Defined Benefit [Member]

Defined Benefit Plan Disclosure [Line Items]

Fair Value of Retirement Plan Assets [Table Text Block]

The fair values of the Company’s U.S. retirement plan assets are as follows:

	December 31, 2012
Asset Category	Quoted Prices in Active Markets for Identical Assets  (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)	Total
	(Dollars in Millions)
Registered investment companies	$	163	$	—	—	$	163
Common trust funds	—		354		—	354
LDI	—		148		—	148
GTAA	—		—		140	140
HFF	—		—		139	139
Cash and cash equivalents	14		—		—	14
Insurance contracts	—		—		8	8
Total	$	177	$	502	287	$	966

	December 31, 2011
Asset Category	Quoted Prices in Active Markets for Identical Assets  (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
	(Dollars in Millions)
Registered investment companies	$	176	$	—	$	—	$	176
Common trust funds	—		216		—		216
LDI	—		256		—		256
GTAA	—		—		142		142
Common and preferred stock	150		—		—		150
HFF	—		—		128		128
Cash and cash equivalents	74		—		—		74
Insurance contracts	—		—		10		10
Total	$	400	$	472	$	280	$	1,152

Significant Unobservable Inputs Used In Fair Value Measurement [Table Text Block]

The fair value measurements which used significant unobservable inputs are as follows:

	GTAA			HFF			Insurance Contracts
	(Dollars in Millions)
Predecessor – Ending balance at December 31, 2009	$	130		$	113		$	10
Actual return on plan assets:
Relating to assets still held at the reporting date	11			3			1
Purchases, sales and settlements	—			—			(1		)
Predecessor – Ending balance at October 1, 2010	$	141		$	116		$	10
Actual return on plan assets:
Relating to assets still held at the reporting date	9			3			(1		)
Successor – Ending balance at December 31, 2010	$	150		$	119		$	9
Actual return on plan assets:
Relating to assets still held at the reporting date	(8		)	(1		)	1
Purchases, sales and settlements	—			10			—
Successor – Ending balance at December 31, 2011	$	142		$	128		$	10
Actual return on plan assets:
Relating to assets still held at the reporting date	11			8			—
Purchases, sales and settlements	(13		)	3			—
Transfer out	—			—			(2		)
Successor – Ending balance at December 31, 2012	$	140		$	139		$	8

Foreign Pension Plans, Defined Benefit [Member]

Defined Benefit Plan Disclosure [Line Items]

Fair Value of Retirement Plan Assets [Table Text Block]

The fair values of the Company’s Non-U.S. retirement plan assets are as follows:

	December 31, 2012
Asset Category	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
	(Dollars in Millions)
Insurance contracts	$	—	$	—	$	199	$	199
Treasury and government securities	22		33		—		55
Registered investment companies	52		—		—		52
Cash and cash equivalents	18		—		—		18
Corporate debt securities	8		9		—		17
Common trust funds	5		8		—		13
Limited partnerships (HFF)	—		—		16		16
Common and preferred stock	16		—		—		16
Other	11		7		—		18
Total	$	132	$	57	$	215	$	404

	December 31, 2011
Asset Category	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
	(Dollars in Millions)
Insurance contracts	$	—	$	—	$	180	$	180
Treasury and government securities	—		58		—		58
Registered investment companies	53		—		—		53
Cash and cash equivalents	12		—		—		12
Corporate debt securities	—		14		—		14
Common trust funds	—		6		—		6
Limited partnerships (HFF)	—		—		6		6
Common and preferred stock	2		—		—		2
Other	7		10		—		17
Total	$	74	$	88	$	186	$	348

Significant Unobservable Inputs Used In Fair Value Measurement [Table Text Block]

Fair value measurements which used significant unobservable inputs are as follows:

	Insurance Contracts			HFF
	(Dollars in Millions)
Predecessor – Ending balance at December 31, 2009	$	180		$	4
Actual return on plan assets:
Relating to assets held at the reporting date	(1		)	—
Purchases, sales and settlements	(1		)	—
Predecessor – Ending balance at October 1, 2010	$	178		$	4
Actual return on plan assets:
Relating to assets held at the reporting date	(1		)	—
Purchases, sales and settlements	2			1
Successor – Ending balance at December 31, 2010	$	179		$	5
Actual return on plan assets:
Relating to assets held at the reporting date	4			—
Purchases, sales and settlements	(3		)	1
Successor – Ending balance at December 31, 2011	$	180		$	6
Actual return on plan assets:
Relating to assets held at the reporting date	16			4
Purchases, sales and settlements	3			6
Successor – Ending balance at December 31, 2012	$	199		$	16