|
Accumulated Other Comprehensive Income (Loss) - Reclassification adjustments (Detail) (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
|
Feb. 28, 2014
|
Feb. 28, 2013
|
Feb. 28, 2014
|
Feb. 28, 2013
|
|
| Accumulated Other Comprehensive Income Loss [Line Items] | ||||
| Reclassification adjustment, interest rate swaps | $ (3.7) | $ (5.4) | $ (25.5) | $ (24.4) |
|
Interest Expense [Member]
|
||||
| Accumulated Other Comprehensive Income Loss [Line Items] | ||||
| Reclassification adjustment, interest rate swaps | $ 6.2 | $ 9.0 | $ 42.3 | $ 40.4 |