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Loans Payable, Long-Term Debt and Other Commitments - Textual (Detail) (USD $)
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12 Months Ended | 12 Months Ended | ||||||||||||||||||||||||||||||
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2013
2.80% notes due 2023 [Member]
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May 31, 2013
2.80% notes due 2023 [Member]
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Dec. 31, 2012
2.80% notes due 2023 [Member]
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Dec. 31, 2013
Variable Rate Obligation [Member]
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Dec. 31, 2012
Variable Rate Obligation [Member]
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Dec. 31, 2013
Other Foreign Debt [Member]
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Dec. 31, 2012
Other Foreign Debt [Member]
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Dec. 31, 2013
4.15% notes due 2043 [Member]
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May 31, 2013
4.15% notes due 2043 [Member]
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Dec. 31, 2012
4.15% notes due 2043 [Member]
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May 31, 2013
Underwritten Public Offering of Senior Unsecured Notes [Member]
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Dec. 31, 2013
0.70% notes due 2016 [Member]
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May 31, 2013
0.70% notes due 2016 [Member]
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Dec. 31, 2012
0.70% notes due 2016 [Member]
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Dec. 31, 2013
Floating Rate Notes Due 2016 [Member]
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May 31, 2013
Floating Rate Notes Due 2016 [Member]
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Dec. 31, 2012
Floating Rate Notes Due 2016 [Member]
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Dec. 31, 2013
1.30% notes due 2018 [Member]
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May 31, 2013
1.30% notes due 2018 [Member]
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Dec. 31, 2012
1.30% notes due 2018 [Member]
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Dec. 31, 2013
Floating Rate Notes Due 2018 [Member]
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May 31, 2013
Floating Rate Notes Due 2018 [Member]
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Dec. 31, 2012
Floating Rate Notes Due 2018 [Member]
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Dec. 31, 2013
Commercial paper [Member]
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Dec. 31, 2012
Commercial paper [Member]
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Dec. 31, 2013
Short Term Foreign Borrowings [Member]
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Dec. 31, 2012
Short Term Foreign Borrowings [Member]
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Dec. 31, 2013
Notes Subject To Repayment At Option Of Holder [Member]
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Dec. 31, 2012
Notes Subject To Repayment At Option Of Holder [Member]
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| Debt Instrument [Line Items] | ||||||||||||||||||||||||||||||||
| Long-term debt, current maturities | $ 2,100,000,000 | $ 1,800,000,000 | ||||||||||||||||||||||||||||||
| Loans payable and current portion of long-term debt | 4,521,000,000 | 4,315,000,000 | 1,600,000,000 | 1,700,000,000 | 402,000,000 | 454,000,000 | 370,000,000 | 328,000,000 | ||||||||||||||||||||||||
| Weighted-average interest rate of commercial paper | 0.09% | 0.15% | ||||||||||||||||||||||||||||||
| Long-Term Debt | 20,539,000,000 | 16,254,000,000 | 1,749,000,000 | 1,750,000,000 | 119,000,000 | 165,000,000 | 64,000,000 | 70,000,000 | 1,246,000,000 | 1,250,000,000 | 6,500,000,000 | 997,000,000 | 1,000,000,000 | 500,000,000 | 500,000,000 | 975,000,000 | 1,000,000,000 | 1,000,000,000 | 1,000,000,000 | |||||||||||||
| Average variable rate of other long term debt borrowings | 0.00% | 0.10% | ||||||||||||||||||||||||||||||
| Maximum rate of foreign borrowings | 4.50% | 8.50% | ||||||||||||||||||||||||||||||
| Stated interest rate of senior unsecured notes | 2.80% | 2.80% | 4.15% | 4.15% | 0.70% | 0.70% | 1.30% | 1.30% | ||||||||||||||||||||||||
| Maximum total debt to capitalization ratio allowable by financial covenants under certain borrowings | 60.00% | |||||||||||||||||||||||||||||||
| Long-term debt, maturities, repayments of principal in 2014 | 2,100,000,000 | |||||||||||||||||||||||||||||||
| Long-term debt, maturities, repayments of principal in 2015 | 2,100,000,000 | |||||||||||||||||||||||||||||||
| Long-term debt, maturities, repayments of principal in 2016 | 2,400,000,000 | |||||||||||||||||||||||||||||||
| Long-term debt, maturities, repayments of principal in 2017 | 1,100,000,000 | |||||||||||||||||||||||||||||||
| Long-term debt, maturities, repayments of principal in 2018 | 3,000,000,000 | |||||||||||||||||||||||||||||||
| Available borrowing capacity under credit facility | 4,000,000,000 | |||||||||||||||||||||||||||||||
| Rental expense under operating leases net of sublease income | 367,000,000 | 396,000,000 | 411,000,000 | |||||||||||||||||||||||||||||
| Minimum aggregate rental commitments under noncancellable leases in 2014 | 259,000,000 | |||||||||||||||||||||||||||||||
| Minimum aggregate rental commitments under noncancellable leases in 2015 | 208,000,000 | |||||||||||||||||||||||||||||||
| Minimum aggregate rental commitments under noncancellable leases in 2016 | 132,000,000 | |||||||||||||||||||||||||||||||
| Minimum aggregate rental commitments under noncancellable leases in 2017 | 91,000,000 | |||||||||||||||||||||||||||||||
| Minimum aggregate rental commitments under noncancellable leases in 2018 | 64,000,000 | |||||||||||||||||||||||||||||||
| Minimum aggregate rental commitments under noncancellable leases thereafter | $ 144,000,000 | |||||||||||||||||||||||||||||||