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Estimated Fair Values of Assets Acquired and Liabilities Assumed at Date of Acquisition (Detail) (USD $) In Millions, unless otherwise specified | Sep. 30, 2012
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Schedule Of Business Acquisitions Purchase Price Allocation [Line Items] |
Current assets, net of cash acquired | $ 1,365
Property, plant and equipment | 205
Intangible assets | 597
Goodwill | 774
Total assets acquired | 2,941
Current liabilities | 549
Long-term debt | 4
Other liabilities | 83
Total liabilities | 636
Cash consideration, net of cash acquired | $ 2,305

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