Other Long-Term Liabilities - Long Term Capital Lease Obligation (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013
Other Liabilities Disclosure [Abstract]
Gross capital lease obligations	$ 2,437
Less imputed interest	(47)
Present value of net minimum lease payments	2,390
Less current portion of capital lease obligation	(955)
Total long-term capital lease obligations	$ 1,435

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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 7

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-Publisher FASB

-Name Accounting Standards Codification

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-Section 50

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Amount of capital lease obligation due within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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+ 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

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-Publisher FASB

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Amount necessary to reduce net minimum lease payments to present value for capital leases.

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-Name Accounting Standards Codification

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-SubTopic 30

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Present value of minimum lease payments for capital leases net of executory costs, including amounts paid by the lessee to the lessor for insurance, maintenance and taxes.

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