Accumulated Other Comprehensive Income (Loss) - Tax effects in other comprehensive income (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
Equity [Abstract]        
Unrecognized actuarial gains (losses), before tax $ (0.6) $ 0 $ (0.6) $ (0.1)
Unrecognized actuarial gains (losses), tax 0.2 0.3 0.2 0.1
Unrecognized actuarial gains (losses), net of tax (0.4) 0.3 (0.4) 0
Foreign currency translation adjustments, before tax 2.1 (73.5) 20.3 (62.1)
Foreign currency translation adjustments, tax (13.5) 9.6 0 5.9
Foreign currency translation adjustments, net tax (11.4) (63.9) 20.3 (56.2)
Unrealized gain (loss) on interest rate swaps, before tax (0.7) 1.7 (10.6) (30.9)
Unrealized gain (loss) on interest rate swaps, tax 0.4 (0.5) 10.8 12.4
Unrealized gain (loss) on interest rate swaps, net of tax (0.3) 1.2 0.2 (18.5)
Reclassifications on interest rate swaps, before tax 6.2 9.0 42.3 40.4
Reclassifications on interest rate swaps, tax (2.5) (3.6) (16.8) (16.0)
Reclassifications on interest rate swaps, net of tax 3.7 5.4 25.5 24.4
Unrealized gain (loss) on available-for-sale securities, before tax 1.4 1.5 4.1 3.7
Unrealized gain (loss) on available-for-sale securities, tax (0.3) 0 (1.7) (0.1)
Unrealized gain (loss) on available-for-sale securities, net of tax 1.1 1.5 2.4 3.6
Accumulated other comprehensive income, before tax 8.4 (61.3) 55.5 (49.0)
Accumulated other comprehensive income, tax (15.7) 5.8 (7.5) 2.3
Other comprehensive income (loss) $ (7.3) $ (55.5) [1] $ 48.0 $ (46.7) [1]
[1] Certain amounts have been reclassified to conform to the current presentation. See Note 1 to the condensed consolidated financial statements for a description of the reclassification.