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Loans Payable, Long-Term Debt and Other Commitments - Long-Term Debt (Detail) (USD $)
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Dec. 31, 2013
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May 31, 2013
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Dec. 31, 2012
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| Debt Instrument [Line Items] |
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|
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| Long-Term Debt |
$ 20,539,000,000 |
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$ 16,254,000,000 |
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2.80% notes due 2023 [Member]
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|
|
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| Debt Instrument [Line Items] |
|
|
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| Stated interest rate of senior unsecured notes |
2.80% |
2.80% |
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| Long-Term Debt |
1,749,000,000 |
1,750,000,000 |
|
|
6.50% notes due 2033 [Member]
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|
|
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| Debt Instrument [Line Items] |
|
|
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| Stated interest rate of senior unsecured notes |
6.50% |
|
|
| Long-Term Debt |
1,306,000,000 |
|
1,310,000,000 |
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5.00% notes due 2019 [Member]
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|
|
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| Debt Instrument [Line Items] |
|
|
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| Stated interest rate of senior unsecured notes |
5.00% |
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| Long-Term Debt |
1,293,000,000 |
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1,294,000,000 |
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4.15% notes due 2043 [Member]
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|
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| Debt Instrument [Line Items] |
|
|
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| Stated interest rate of senior unsecured notes |
4.15% |
4.15% |
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| Long-Term Debt |
1,246,000,000 |
1,250,000,000 |
|
|
3.875% notes due 2021 [Member]
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| Debt Instrument [Line Items] |
|
|
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| Stated interest rate of senior unsecured notes |
3.875% |
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| Long-Term Debt |
1,148,000,000 |
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1,147,000,000 |
|
6.55% notes due 2037 [Member]
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| Debt Instrument [Line Items] |
|
|
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| Stated interest rate of senior unsecured notes |
6.55% |
|
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| Long-Term Debt |
1,143,000,000 |
|
1,146,000,000 |
|
6.00% notes due 2017 [Member]
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|
|
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| Debt Instrument [Line Items] |
|
|
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| Stated interest rate of senior unsecured notes |
6.00% |
|
|
| Long-Term Debt |
1,095,000,000 |
|
1,112,000,000 |
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4.00% notes due 2015 [Member]
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|
|
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| Debt Instrument [Line Items] |
|
|
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| Stated interest rate of senior unsecured notes |
4.00% |
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| Long-Term Debt |
1,029,000,000 |
|
1,049,000,000 |
|
4.75% notes due 2015 [Member]
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|
|
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| Debt Instrument [Line Items] |
|
|
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| Stated interest rate of senior unsecured notes |
4.75% |
|
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| Long-Term Debt |
1,023,000,000 |
|
1,044,000,000 |
|
2.40% notes due 2022 [Member]
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|
|
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| Debt Instrument [Line Items] |
|
|
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| Stated interest rate of senior unsecured notes |
2.40% |
|
|
| Long-Term Debt |
1,000,000,000 |
|
1,000,000,000 |
|
Floating Rate Notes Due 2018 [Member]
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| Debt Instrument [Line Items] |
|
|
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| Long-Term Debt |
1,000,000,000 |
1,000,000,000 |
|
|
1.10% notes due 2018 [Member]
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|
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| Debt Instrument [Line Items] |
|
|
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| Stated interest rate of senior unsecured notes |
1.10% |
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| Long-Term Debt |
998,000,000 |
|
998,000,000 |
|
0.70% notes due 2016 [Member]
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|
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| Debt Instrument [Line Items] |
|
|
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| Stated interest rate of senior unsecured notes |
0.70% |
0.70% |
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| Long-Term Debt |
997,000,000 |
1,000,000,000 |
|
|
1.30% notes due 2018 [Member]
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|
|
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| Debt Instrument [Line Items] |
|
|
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| Stated interest rate of senior unsecured notes |
1.30% |
1.30% |
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| Long-Term Debt |
975,000,000 |
1,000,000,000 |
|
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2.25% notes due 2016 [Member]
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|
|
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| Debt Instrument [Line Items] |
|
|
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| Stated interest rate of senior unsecured notes |
2.25% |
|
|
| Long-Term Debt |
866,000,000 |
|
874,000,000 |
|
5.85% notes due 2039 [Member]
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|
|
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| Debt Instrument [Line Items] |
|
|
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| Stated interest rate of senior unsecured notes |
5.85% |
|
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| Long-Term Debt |
749,000,000 |
|
749,000,000 |
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Floating Rate Notes Due 2016 [Member]
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|
|
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| Debt Instrument [Line Items] |
|
|
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| Long-Term Debt |
500,000,000 |
500,000,000 |
|
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6.40% debentures due 2028 [Member]
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|
|
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| Debt Instrument [Line Items] |
|
|
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| Stated interest rate of senior unsecured notes |
6.40% |
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| Long-Term Debt |
499,000,000 |
|
499,000,000 |
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5.75% notes due 2036 [Member]
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| Debt Instrument [Line Items] |
|
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| Stated interest rate of senior unsecured notes |
5.75% |
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| Long-Term Debt |
498,000,000 |
|
498,000,000 |
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5.95% debentures due 2028 [Member]
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| Debt Instrument [Line Items] |
|
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| Stated interest rate of senior unsecured notes |
5.95% |
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| Long-Term Debt |
498,000,000 |
|
498,000,000 |
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3.60% notes due 2042 [Member]
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|
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| Debt Instrument [Line Items] |
|
|
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| Stated interest rate of senior unsecured notes |
3.60% |
|
|
| Long-Term Debt |
492,000,000 |
|
492,000,000 |
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6.30% debentures due 2026 [Member]
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|
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| Debt Instrument [Line Items] |
|
|
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| Stated interest rate of senior unsecured notes |
6.30% |
|
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| Long-Term Debt |
249,000,000 |
|
248,000,000 |
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5.375% euro-denominated notes due 2014 [Member]
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|
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| Debt Instrument [Line Items] |
|
|
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| Stated interest rate of senior unsecured notes |
5.375% |
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|
| Long-Term Debt |
0 |
|
2,058,000,000 |
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Other [Member]
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| Debt Instrument [Line Items] |
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| Long-Term Debt |
$ 186,000,000 |
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$ 238,000,000 |