Scheduled Principal Payments on Long Term Debt (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Long Term Debt Maturities Repayments Of Principal [Line Items]
2013	$ 56
2014	36
2015	3
2016	4
2017	2
Thereafter	758
Total	$ 859	$ 855

Obligation related to long-term debt (excluding convertible debt) and capital leases.

No definition available.

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Amount of long-term debt and capital lease obligations maturing in the next fiscal year following the latest fiscal year.

No definition available.

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Amount of long-term debt and capital lease obligations maturing after the fifth rolling twelve months following the latest balance sheet presented.

No definition available.

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Amount of long-term debt and capital lease obligations maturing in the fifth rolling twelve months following the latest balance sheet presented.

No definition available.

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Amount of long-term debt and capital lease obligations maturing in the fourth rolling twelve months following the latest balance sheet presented.

No definition available.

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Amount of long-term debt and capital lease obligations maturing in the third rolling twelve months following the latest balance sheet presented.

No definition available.

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Amount of long-term debt and capital lease obligations maturing in the second rolling twelve months following the latest balance sheet presented.

No definition available.

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