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Derivatives and Hedging Activities - Additional Information (Detail) (USD $) In Millions, unless otherwise specified | 3 Months Ended |  | 12 Months Ended | 3 Months Ended | 9 Months Ended |  |  | 3 Months Ended |  | 3 Months Ended | 9 Months Ended |  |
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Sep. 30, 2012 Derivative | Dec. 31, 2011 Derivative | Dec. 31, 2011 Interest Rate Swaps [Member] | Sep. 30, 2012 Designated as Hedging Instrument [Member] | Dec. 31, 2011 Designated as Hedging Instrument [Member] | Sep. 30, 2011 Designated as Hedging Instrument [Member] | Sep. 30, 2012 Designated as Hedging Instrument [Member] | Sep. 30, 2011 Designated as Hedging Instrument [Member] | Sep. 30, 2012 5.625 % Senior Notes due July 2013 [Member] | Dec. 31, 2011 5.625 % Senior Notes due July 2013 [Member] | Sep. 30, 2012 12% Senior Notes due February 2014 [Member] | Dec. 31, 2011 12% Senior Notes due February 2014 [Member] | Dec. 31, 2011 Foreign Exchange Option [Member] Interest Rate Swaps [Member] | Sep. 30, 2012 Foreign Exchange Option [Member] Interest Rate Swaps [Member] | Sep. 30, 2012 Foreign currency forward contracts [Member] | Dec. 31, 2011 Foreign currency forward contracts [Member]
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Maximum original maturity period of Foreign Currency Forward Contracts |  |  |  |  |  |  |  |  |  |  |  |  |  | 12 months |  |
Estimated fair value of foreign currency forward contract, asset |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 6 | $ 15
Interest rate on senior notes |  |  |  |  |  |  |  |  | 5.625% | 5.625% | 12.00% | 12.00% |  |  |  |
Cash received from termination of swaps | 2 |  |  |  |  |  |  |  |  |  | 2 |  |  |  |  |
Terminated an interest rate swap with notional amount interest rate swaps |  |  |  |  |  |  |  |  |  |  |  |  | 7 |  |  |
Increase (decrease) in carrying value due to interest rate swap |  |  |  |  | 6 |  |  |  |  |  |  |  |  |  |  |
Increase (decrease) in interest expense due to interest rate swap |  |  |  | 0.2 | 1.0 | 2.0 | 0.7 | 4.0 |  |  |  |  |  |  |  |
Mark to market adjustment to record Increase or decrease in the carrying amount of the 12% and 5.625% Senior Notes |  |  | $ 2 |  |  |  |  |  |  |  |  |  |  |  |  |
Number of foreign exchange options outstanding | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of interest rate and Currency swap agreements outstanding | 0 | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Interest rate stated in the contractual debt agreement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 22 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22(a)(1)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Maximum amount of time remaining before foreign currency exchange rate derivatives mature or expire, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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