Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2012

Commitments and Contingencies

Summary of the entity's capital lease activity

	Successor				Predecessor
	Year Ended December 31, 2012		Nine Months Ended December 31, 2011		Three Months Ended March 31, 2011		Year Ended December 31, 2010
	(Dollars in millions)
Assets acquired through capital leases	$	—		2		16		116
Depreciation expense		50		41		11		28
Cash payments towards capital leases		41		35		11		25

	Successor
	December 31, 2012		December 31, 2011
Assets included in property, plant and equipment	$	188		192
Accumulated depreciation		85		41

Schedule of future annual minimum payments under capital lease

	Future Minimum Payments
	(Dollars in millions)
Capital lease obligations:
2013	$	46
2014		35
2015		21
2016		2
2017		1
2018 and thereafter		6
Total minimum payments		111
Less: amount representing interest and executory costs		(14	)
Present value of minimum payments		97
Less: current portion		(40	)
Long-term portion	$	57

Schedule of future minimum payments under operating leases

	Future Minimum Payments
	(Dollars in millions)
Operating leases:
2013	$	55
2014		36
2015		30
2016		25
2017		20
2018 and thereafter		39
Total future minimum payments(1)	$	205

(1)

Minimum payments have not been reduced by minimum sublease rentals of $32 million due in the future under non-cancelable subleases.