Long-term Debt and Other Financing Arrangements - Summary of Future Minimum Capital Lease Payments under Non-Cancelable Capital Leases (Detail) (USD $) In Millions, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Debt Disclosure [Abstract]
2013		$ 19
2014		15
2015		14
2016		14
2017		14
Thereafter		91
Total		167
Less: amount representing interest		60
Present value of minimum lease payments	106	107	115
Current portion		10
Total non-current portion		97
Present value of minimum lease payments	$ 106	$ 107	$ 115

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date.

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Amount of minimum lease payments maturing in the forth fiscal year following the latest fiscal year for capital leases.

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Amount of minimum lease payments maturing in the third fiscal year following the latest fiscal year for capital leases.

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