Subsequent Events - Schedule of Proforma Debt (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012
Proforma Debt Instrument [Line Items]
Long Term Debt	$ 2,249
Revolving Credit Facility [Member]
Proforma Debt Instrument [Line Items]
Long Term Debt	31	[1]
Term Loan Facility [Member]
Proforma Debt Instrument [Line Items]
Long Term Debt	594	[2]
6.0% Senior Secured Notes Due 2021[Member]
Proforma Debt Instrument [Line Items]
Long Term Debt	500
6.25% Senior Secured Notes Due 2021 [Member]
Proforma Debt Instrument [Line Items]
Long Term Debt	225	[3]
11.5% Senior Unsecured Notes Due 2018 [Member]
Proforma Debt Instrument [Line Items]
Long Term Debt	749	[4]
13.75% Senior Notes Due 2019 [Member]
Proforma Debt Instrument [Line Items]
Long Term Debt	$ 150

[1] Reflects $150 million of commitments under the New Revolving Credit Facility of which $31 million was drawn at closing of the 2012 Refinancing, less letters of credit outstanding of approximately $1 million at closing of the 2012 Refinancing. We repaid in full the $31 million of borrowings incurred under the New Revolving Credit Facility in connection with the 2012 Refinancing on December 3, 2012.

[2] Face amount of $600 million less unamortized discount of $6 million.

[3] Face amount of €175 million. Amount above represents the dollar equivalent of such notes as of September 30, 2012.

[4] Face amount of $765 million less unamortized discount of $16 million.