Short-Term Borrowings (Narrative) (Details)
$ / shares in Units, $ in Millions |
9 Months Ended |
|
|
Sep. 30, 2015
USD ($)
$ / shares
|
Dec. 05, 2014
USD ($)
|
| Short-term Debt [Line Items] |
|
|
| Revolving credit facility |
$ 2,600.0
|
|
| Default Provision Floor |
$ 50.0
|
|
| Minimum |
|
|
| Short-term Debt [Line Items] |
|
|
| Line of Credit Facility, Commitment Fee Percentage |
0.125%
|
|
| Distribution Made to Limited Partner, Distributions Paid, Per Unit | $ / shares |
$ 0.1675
|
|
| Maximum |
|
|
| Short-term Debt [Line Items] |
|
|
| Line of Credit Facility, Commitment Fee Percentage |
0.35%
|
|
| Ratio of Indebtedness to Net Capital |
1.00
|
|
| Line of Credit [Member] |
|
|
| Short-term Debt [Line Items] |
|
|
| Line of Credit |
$ 20.0
|
|
| Revolving Credit Facility |
|
|
| Short-term Debt [Line Items] |
|
|
| Revolving credit facility |
500.0
|
$ 1,500.0
|
| Letters of Credit Outstanding |
0.0
|
|
| Letter of Credit |
|
|
| Short-term Debt [Line Items] |
|
|
| Revolving credit facility |
$ 50.0
|
|
| Period 1 | Minimum |
|
|
| Short-term Debt [Line Items] |
|
|
| Ratio of Indebtedness to Net Capital |
5.75
|
|
| Period 1 | Maximum |
|
|
| Short-term Debt [Line Items] |
|
|
| Ratio of Indebtedness to Net Capital |
1.00
|
|
| Period 2 | Minimum |
|
|
| Short-term Debt [Line Items] |
|
|
| Ratio of Indebtedness to Net Capital |
5.50
|
|
| Period 2 | Maximum |
|
|
| Short-term Debt [Line Items] |
|
|
| Ratio of Indebtedness to Net Capital |
1.00
|
|
| Period 3 | Minimum |
|
|
| Short-term Debt [Line Items] |
|
|
| Ratio of Indebtedness to Net Capital |
5.00
|
|
| Acquisition Period | Minimum |
|
|
| Short-term Debt [Line Items] |
|
|
| Ratio of Indebtedness to Net Capital |
5.50
|
|
| Acquisition Period | Maximum |
|
|
| Short-term Debt [Line Items] |
|
|
| Ratio of Indebtedness to Net Capital |
1.00
|
|
| Federal Funds Effective Swap Rate |
|
|
| Short-term Debt [Line Items] |
|
|
| Basis Spread on Variable Rate |
0.50%
|
|
| Federal Funds Effective Swap Rate | Minimum |
|
|
| Short-term Debt [Line Items] |
|
|
| Margin Rate |
0.00%
|
|
| Federal Funds Effective Swap Rate | Maximum |
|
|
| Short-term Debt [Line Items] |
|
|
| Margin Rate |
0.65%
|
|
| London Interbank Offered Rate (LIBOR) |
|
|
| Short-term Debt [Line Items] |
|
|
| Basis Spread on Variable Rate |
1.00%
|
|
| London Interbank Offered Rate (LIBOR) | Minimum |
|
|
| Short-term Debt [Line Items] |
|
|
| Margin Rate |
0.00%
|
|
| London Interbank Offered Rate (LIBOR) | Maximum |
|
|
| Short-term Debt [Line Items] |
|
|
| Margin Rate |
0.65%
|
|
| Eurodollar | Minimum |
|
|
| Short-term Debt [Line Items] |
|
|
| Margin Rate |
1.00%
|
|
| Eurodollar | Maximum |
|
|
| Short-term Debt [Line Items] |
|
|
| Margin Rate |
1.65%
|
|