Accounting for derivative instruments - AOCI (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
|
| AOCI Attributable to Parent, Net of Tax | ||||
| Change in fair value of cash flow hedges | $ (0.4) | $ (0.6) | $ (0.8) | |
| Realized from OCI during the period | $ 0.2 | 0.2 | 0.5 | 0.6 |
| Interest rate swaps | ||||
| AOCI Attributable to Parent, Net of Tax | ||||
| Accumulated OCI balance at beginning of period | (0.1) | 0.1 | 0.2 | 0.1 |
| Change in fair value of cash flow hedges | 0.0 | (0.4) | (0.6) | (0.8) |
| Realized from OCI during the period | 0.2 | 0.2 | 0.5 | 0.6 |
| Accumulated OCI balance at end of period | $ 0.1 | $ (0.1) | $ 0.1 | $ (0.1) |
| X | ||||||||||
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
|
| X | ||||||||||
- Definition Accumulated change, net of tax, in accumulated gains and losses from derivative instruments designated and qualifying as the effective portion of cash flow hedges. Includes an entity's share of an equity investee's Increase or Decrease in deferred hedging gains or losses. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount after tax of reclassification adjustment from accumulated other comprehensive income of accumulated gain (loss) realized from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's deferred hedging gain (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount after tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|