Fair Value Measurements (Carrying Amounts And Fair Values Of Financial Instruments) (Details) - USD ($) $ in Millions |
Sep. 30, 2016 |
Dec. 31, 2015 |
---|---|---|
Assets: | ||
Available-for-sale securities | $ 160.8 | $ 401.4 |
Carrying amount | ||
Assets: | ||
Available-for-sale securities | 160.8 | 401.4 |
Liabilities: | ||
Notes payable and current portion of long-term debt | 809.1 | 845.2 |
Long-term debt | 7,503.1 | 12,025.2 |
Fair value | ||
Assets: | ||
Available-for-sale securities | 160.8 | 401.4 |
Liabilities: | ||
Notes payable and current portion of long-term debt | 809.1 | 845.2 |
Long-term debt | $ 8,098.9 | $ 12,471.4 |