Transactions With Affiliates (Schedule of Long-term Debt) (Details) - USD ($)
$ in Millions |
9 Months Ended |
|
Sep. 30, 2015 |
Dec. 31, 2014 |
| Schedule of Related Party Transactions, Long-Term Debt [Line Items] |
|
|
|
| Long-term Debt |
|
$ 630.9
|
|
| Notes Due 2015 |
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|
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| Schedule of Related Party Transactions, Long-Term Debt [Line Items] |
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| Debt Instrument, Issuance Date |
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Nov. 28, 2005
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| Debt Instrument, Interest Rate, Stated Percentage |
|
5.41%
|
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| Debt Instrument, Maturity Date |
|
Nov. 30, 2015
|
|
| Long-term Debt |
[1] |
$ 0.0
|
|
| Notes Due 2016 |
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| Schedule of Related Party Transactions, Long-Term Debt [Line Items] |
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| Debt Instrument, Issuance Date |
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Nov. 28, 2005
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| Debt Instrument, Interest Rate, Stated Percentage |
|
5.45%
|
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| Debt Instrument, Maturity Date |
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Nov. 28, 2016
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| Long-term Debt |
|
$ 0.0
|
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| Notes Due 2025 |
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| Schedule of Related Party Transactions, Long-Term Debt [Line Items] |
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| Debt Instrument, Issuance Date |
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Nov. 28, 2005
|
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| Debt Instrument, Interest Rate, Stated Percentage |
|
5.92%
|
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| Debt Instrument, Maturity Date |
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Nov. 28, 2025
|
|
| Long-term Debt |
|
$ 0.0
|
|
| Notes Due 2032 |
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| Schedule of Related Party Transactions, Long-Term Debt [Line Items] |
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| Debt Instrument, Issuance Date |
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Nov. 28, 2012
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| Debt Instrument, Interest Rate, Stated Percentage |
|
4.63%
|
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| Debt Instrument, Maturity Date |
|
Nov. 28, 2032
|
|
| Long-term Debt |
|
$ 0.0
|
|
| Notes Due 2037 |
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| Schedule of Related Party Transactions, Long-Term Debt [Line Items] |
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| Debt Instrument, Issuance Date |
|
Nov. 28, 2012
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| Debt Instrument, Interest Rate, Stated Percentage |
|
4.94%
|
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| Debt Instrument, Maturity Date |
|
Nov. 30, 2037
|
|
| Long-term Debt |
|
$ 0.0
|
|
| Notes Due 2037 [1] |
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| Schedule of Related Party Transactions, Long-Term Debt [Line Items] |
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| Debt Instrument, Issuance Date |
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Dec. 19, 2012
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| Debt Instrument, Interest Rate, Stated Percentage |
|
5.16%
|
|
| Debt Instrument, Maturity Date |
|
Dec. 21, 2037
|
|
| Long-term Debt |
|
$ 0.0
|
|
| Notes Due 2042 |
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| Schedule of Related Party Transactions, Long-Term Debt [Line Items] |
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|
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| Debt Instrument, Issuance Date |
|
Nov. 28, 2012
|
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| Debt Instrument, Interest Rate, Stated Percentage |
|
5.26%
|
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| Debt Instrument, Maturity Date |
|
Nov. 28, 2042
|
|
| Long-term Debt |
|
$ 0.0
|
|
| Notes Due 2042 [1] |
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| Schedule of Related Party Transactions, Long-Term Debt [Line Items] |
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|
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| Debt Instrument, Issuance Date |
|
Dec. 19, 2012
|
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| Debt Instrument, Interest Rate, Stated Percentage |
|
5.49%
|
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| Debt Instrument, Maturity Date |
|
Dec. 18, 2042
|
|
| Long-term Debt |
|
$ 0.0
|
|
| Notes Due 2016 [1] |
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| Schedule of Related Party Transactions, Long-Term Debt [Line Items] |
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|
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| Debt Instrument, Issuance Date |
|
Dec. 09, 2013
|
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| Debt Instrument, Interest Rate, Stated Percentage |
|
4.75%
|
|
| Debt Instrument, Maturity Date |
|
Dec. 31, 2016
|
|
| Long-term Debt |
[2] |
$ 630.9
|
|
| Predecessor |
|
|
|
| Schedule of Related Party Transactions, Long-Term Debt [Line Items] |
|
|
|
| Long-term Debt |
|
|
$ 1,588.7
|
| Predecessor | Notes Due 2015 |
|
|
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| Schedule of Related Party Transactions, Long-Term Debt [Line Items] |
|
|
|
| Long-term Debt |
[1] |
|
115.9
|
| Predecessor | Notes Due 2016 |
|
|
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| Schedule of Related Party Transactions, Long-Term Debt [Line Items] |
|
|
|
| Long-term Debt |
|
|
45.3
|
| Predecessor | Notes Due 2025 |
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|
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| Schedule of Related Party Transactions, Long-Term Debt [Line Items] |
|
|
|
| Long-term Debt |
|
|
133.5
|
| Predecessor | Notes Due 2032 |
|
|
|
| Schedule of Related Party Transactions, Long-Term Debt [Line Items] |
|
|
|
| Long-term Debt |
|
|
45.0
|
| Predecessor | Notes Due 2037 |
|
|
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| Schedule of Related Party Transactions, Long-Term Debt [Line Items] |
|
|
|
| Long-term Debt |
|
|
95.0
|
| Predecessor | Notes Due 2037 [1] |
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|
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| Schedule of Related Party Transactions, Long-Term Debt [Line Items] |
|
|
|
| Long-term Debt |
|
|
55.0
|
| Predecessor | Notes Due 2042 |
|
|
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| Schedule of Related Party Transactions, Long-Term Debt [Line Items] |
|
|
|
| Long-term Debt |
|
|
170.0
|
| Predecessor | Notes Due 2042 [1] |
|
|
|
| Schedule of Related Party Transactions, Long-Term Debt [Line Items] |
|
|
|
| Long-term Debt |
|
|
95.0
|
| Predecessor | Notes Due 2016 [1] |
|
|
|
| Schedule of Related Party Transactions, Long-Term Debt [Line Items] |
|
|
|
| Long-term Debt |
[2] |
|
$ 834.0
|
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