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Fair Value Measurements and Financial Instruments - Additional Information (Detail) (USD $)
In Billions, unless otherwise specified |
12 Months Ended | 12 Months Ended | 1 Months Ended | |||||
|---|---|---|---|---|---|---|---|---|
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Dec. 31, 2012
|
Dec. 31, 2013
Forward Interest Rate Swaps
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Dec. 31, 2013
Interest Rate Swaps
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Sep. 30, 2013
Interest Rate Swaps
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Jun. 30, 2013
Interest Rate Swaps
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Dec. 31, 2012
Interest Rate Swaps
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Dec. 31, 2013
Cross Currency Swaps
|
Feb. 26, 2014
Cross Currency Swaps
Subsequent Event
|
|
| Derivatives, Fair Value [Line Items] | ||||||||
| Notional amount | $ 2.00 | $ 1.80 | $ 1.80 | $ 1.25 | $ 5.80 | |||
| Net proceeds from settlement of interest rate swaps | 0.7 | |||||||
| Proceeds from other debt | $ 1.6 | $ 5.4 | ||||||