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Stockholders' Equity - Additional Information (Detail) (USD $)
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1 Months Ended | 3 Months Ended | |
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Oct. 31, 2013
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Dec. 31, 2013
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Jan. 30, 2014
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| Stockholders' Equity Note [Line Items] | |||
| Stock Repurchase Remaining Authorized Amount | $ 4,200,000,000 | ||
| Stock Repurchase Program, Authorized Amount | 5,000,000,000 | ||
| Dividends Payable, Amount Per Share (in USD per Share) | $ 0.40 | ||
| Dividends, Cash | $ 254,000,000 | ||
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Subsequent Event
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| Stockholders' Equity Note [Line Items] | |||
| Dividends Payable, Amount Per Share (in USD per Share) | $ 0.4 |