|
Assets and Liabilities Measured at Fair Value (Details) (Recurring, USD $)
In Millions, unless otherwise specified |
Jun. 30, 2014
|
Dec. 31, 2013
|
Dec. 31, 2012
|
|---|---|---|---|
| Current assets: | |||
| Cash equivalents | $ 463 | $ 342 | $ 424 |
| Long-term liabilities: | |||
| Debt (note 6) | 4,071 | 3,783 | 3,626 |
|
Level 1
|
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| Current assets: | |||
| Cash equivalents | 463 | 342 | 424 |
|
Level 2
|
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| Long-term liabilities: | |||
| Debt (note 6) | $ 4,071 | $ 3,783 | $ 3,626 |