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Debt Obligations and Commitments - Additional Information (Detail) (USD $)
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3 Months Ended | ||||||||
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Sep. 08, 2012
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Jun. 16, 2012
Extended Unsecured Revolving Credit Agreement Ending June 2016 [Member]
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Jun. 16, 2012
Extended Unsecured Revolving Credit Agreement Ending June 2013 [Member]
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Mar. 24, 2012
0.750% Senior Notes Due 2015 [Member]
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Mar. 24, 2012
2.750% Senior Notes Due 2022 [Member]
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Mar. 24, 2012
4.000% Senior Notes Due 2042 [Member]
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Sep. 08, 2012
0.700% Senior Notes Due 2015 [Member]
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Sep. 08, 2012
1.250% Senior Notes Due 2017 [Member]
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Sep. 08, 2012
3.600% Senior Notes Due 2042 [Member]
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| Debt Instrument [Line Items] | |||||||||
| Fixed and floating rate notes issued | $ 750,000,000 | $ 1,250,000,000 | $ 750,000,000 | $ 900,000,000 | $ 1,000,000,000 | $ 600,000,000 | |||
| Interest rate on debt | 0.75% | 2.75% | 4.00% | 0.70% | 1.25% | 3.60% | |||
| Debt instrument, term of agreement | 4 years | 364 days | |||||||
| Commercial paper outstanding | $ 900,000,000 | ||||||||