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Derivative Financial Instruments (Schedule of Interest Rate Swap Derivatives) (Details) (USD $)
In Millions, unless otherwise specified |
9 Months Ended | 12 Months Ended | ||||
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Sep. 30, 2014
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Dec. 31, 2013
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Swap Derivative 1 Point 71 Percent Maturing January 2, 2014 [Member]
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| Derivative [Line Items] | ||||||
| Effective Date | Jan. 02, 2012 | |||||
| Expiration Date | Jan. 02, 2014 | |||||
| Fixed Rate | 1.71% | [1] | ||||
| Notional Value | $ 1,100 | |||||
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Swap Derivative 1 Point 02 Percent Maturing January 2, 2016 [Member]
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| Derivative [Line Items] | ||||||
| Effective Date | Jan. 02, 2014 | Jan. 02, 2014 | ||||
| Expiration Date | Jan. 02, 2016 | Jan. 02, 2016 | ||||
| Fixed Rate | 1.02% | [1] | 1.02% | [1] | ||
| Notional Value | $ 500 | $ 500 | ||||
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