|
Fair Value Measurements (Narrative) (Details) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | ||
|---|---|---|---|
|
Sep. 30, 2013
|
Dec. 31, 2014
|
Dec. 31, 2013
|
|
| Available number of funds | 2 | ||
| Sale Of Certificates Of Deposit | $ 150.0 | ||
| Amount Transfered From Short Term To Available-For-Sale | 167.2 | ||
| Amount Transferred From Held To Maturity To Available-For-Sale | 31.4 | ||
| Short-term Investments [Member] | Nextel Brazil [Member] | |||
| Available for sale securities | 110.1 | 418.6 | |
| ARGENTINA | |||
| Money Market Funds, at Carrying Value | 43.5 |