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Restricted Securities Available For Sale (Tables) | 3 Months Ended
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Mar. 31, 2014
Restricted Securities Available For Sale [Abstract] |
Schedule Of Restricted Securities Available For Sale |
(In millions) | As of March 31, 2014
| Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value
Commercial paper | $ | 24.1 |  | $ | – |  | $ | – |  | $ | 24.1
US Government and agency securities |  | 19.9 |  |  | – |  |  | (0.1) |  |  | 19.8
Certificates of deposit |  | 5.1 |  |  | – |  |  | – |  |  | 5.1
Corporate bonds |  | 3.4 |  |  | – |  |  | (0.1) |  |  | 3.3
Total restricted securities available for sale |  | 52.5 |  |  | – |  |  | (0.2) |  |  | 52.3
(In millions) | As of December 31, 2013
| Cost |  | Gross Unrealized Gains |  | Gross Unrealized Losses |  | Estimated Fair Value
Commercial paper | $ | 23.9 |  | $ | – |  | $ | – |  | $ | 23.9
US Government and agency securities |  | 22.3 |  |  | – |  |  | (0.2) |  |  | 22.1
Certificates of deposit |  | 4.6 |  |  | – |  |  | – |  |  | 4.6
Corporate bonds |  | 3.1 |  |  | – |  |  | (0.1) |  |  | 3.0
Total restricted securities available for sale |  | 53.9 |  |  | – |  |  | (0.3) |  |  | 53.6
Schedule Of Restricted Securities Available For Sale By Aging Category |
(In millions) | Securities Available for Sale with Gross Unrealized Losses as of March 31, 2014
| Less than 12 Months |  | 12 Months or More |  |
| Estimated Fair Value |  | Gross Unrealized Losses |  | Estimated Fair Value |  | Gross Unrealized Losses |  | Total Estimated Fair Value |  | Total Gross Unrealized Losses
Commercial paper | $ | 6.9 |  | $ | – |  | $ | – |  | $ | – |  | $ | 6.9 |  | $ | -
US Government and agency securities |  | 5.8 |  |  | (0.1) |  |  | 1.1 |  |  | – |  |  | 6.9 |  |  | (0.1)
Certificates of deposit |  | 1.0 |  |  | – |  |  | – |  |  | – |  |  | 1.0 |  |  | –
Corporate bonds |  | 1.3 |  |  | - |  |  | 0.9 |  |  | (0.1 | ) |  | 2.2 |  |  | (0.1)
Total restricted securities available for sale |  | 15.0 |  |  | (0.1) |  |  | 2.0 |  |  | (0.1 | ) |  | 17.0 |  |  | (0.2)
(In millions) | Securities Available for Sale with Gross Unrealized Losses as of December 31, 2013
| Less than 12 Months |  | 12 Months or More |  |
| Estimated Fair Value |  | Gross Unrealized Losses |  | Estimated Fair Value |  | Gross Unrealized Losses |  | Total Estimated Fair Value |  | Total Gross Unrealized Losses
Commercial paper | $ | 10.0 |  | $ | – |  | $ | – |  | $ | – |  | $ | 10.0 |  | $ | –
US Government and agency securities |  | 11.8 |  |  | (0.2) |  |  | – |  |  | – |  |  | 11.8 |  |  | (0.2)
Certificates of deposit |  | 1.9 |  |  | – |  |  | – |  |  | – |  |  | 1.9 |  |  | –
Corporate bonds |  | 2.3 |  |  | (0.1) |  |  | – |  |  | – |  |  | 2.3 |  |  | (0.1)
Total restricted securities available for sale |  | 26.0 |  |  | (0.3) |  |  | – |  |  | – |  |  | 26.0 |  |  | (0.3)
Schedule Of Cost And Estimated Fair Values Of Debt Securities By Contractual Maturity |
(In millions) | As of
| March 31, 2014 |  | December 31, 2013
| Cost |  | Estimated Fair Value |  | Cost |  | Estimated Fair Value
Contractual Maturity |  |  |  |  |  |  |  |  |  |  |
Within one year | $ | 39.0 |  | $ | 39.0 |  | $ | 41.6 |  | $ | 41.6
Over one year to five years |  | 8.7 |  |  | 8.6 |  |  | 7.8 |  |  | 7.8
Over five years to ten years |  | 4.6 |  |  | 4.5 |  |  | 4.5 |  |  | 4.2
Over ten years |  | 0.2 |  |  | 0.2 |  |  | – |  |  | –
Total restricted securities available for sale | $ | 52.5 |  | $ | 52.3 |  | $ | 53.9 |  | $ | 53.6

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