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Debt - Debt Summary (Parenthetical) (Detail) (USD $)
In Billions, unless otherwise specified |
Sep. 30, 2014
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|---|---|
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Euro [Member]
|
|
| Schedule of Capitalization, Long-term Debt [Line Items] | |
| Foreign principal borrowing included in total debt denominated in non-U.S. dollars | $ 3.2 |
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Japanese Yen [Member]
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|
| Schedule of Capitalization, Long-term Debt [Line Items] | |
| Foreign principal borrowing included in total debt denominated in non-U.S. dollars | 0.5 |
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British pounds sterling [Member]
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|
| Schedule of Capitalization, Long-term Debt [Line Items] | |
| Foreign principal borrowing included in total debt denominated in non-U.S. dollars | $ 0.1 |