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Basic and Diluted Earnings Per Share (Parenthetical) (Detail)
In Millions, unless otherwise specified |
3 Months Ended | |
|---|---|---|
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Dec. 31, 2013
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Dec. 31, 2012
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| Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items] | ||
| Stock options included in the computation of diluted shares outstanding | 2 | 2 |
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Stock Options | Maximum
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| Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items] | ||
| Stock options excluded from computation of average dilutive shares outstanding | 1 | 1 |
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Class B common stock
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| Schedule of Earnings Per Share, Basic and Diluted, by Common Class [Line Items] | ||
| Weighted-average as-converted class B common stock used in income allocation | 103 | 103 |