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Fair Value Measurements (Narrative) (Details) (USD $) In Millions, unless otherwise specified
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3 Months Ended |
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Mar. 31, 2015
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Apr. 30, 2014
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| National Pump |
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| Derivatives, Fair Value [Line Items] |
|
|
| Contingent consideration |
|
$ 76 |
| Merger related costs |
|
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| Derivatives, Fair Value [Line Items] |
|
|
| Change in contingent consideration |
(27) |
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| Diesel swap | Fixed price swap contracts |
|
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| Derivatives, Fair Value [Line Items] |
|
|
| Fixed price swap contract (in gallons) |
10,600,000 |
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| Average contract price (in dollars per gallon) |
3.22 |
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| Average forward price (in dollars per gallon) |
2.92 |
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| Level 3 | National Pump | Accrued expenses and other liabilities |
|
|
| Derivatives, Fair Value [Line Items] |
|
|
| Contingent consideration |
50 |
|
| First earn-out payment | National Pump |
|
|
| Derivatives, Fair Value [Line Items] |
|
|
| Contingent consideration |
50 |
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| Second earn-out payment | National Pump |
|
|
| Derivatives, Fair Value [Line Items] |
|
|
| Contingent consideration |
$ 0 |
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