XML 68 R56.htm IDEA: XBRL DOCUMENT v3.8.0.1
Retirement-Related Benefit Plans' Impact on Income Before Income Taxes (Detail) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Nov. 30, 2017
Nov. 30, 2016
Nov. 30, 2017
Nov. 30, 2016
Pension Benefits | U.S. Plans        
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]        
Service cost $ 9,465 $ 9,401 $ 18,930 $ 18,802
Interest cost 4,379 4,331 8,758 8,662
Expected return on plan assets (8,086) (6,252) (16,172) (12,504)
Amortization of Prior service cost (credit) 29 54 58 108
Amortization of Net actuarial losses recognized 3,618 5,540 7,236 11,080
Net Periodic Benefit (Credit) Cost 9,405 13,074 18,810 26,148
Pension Benefits | Non-U.S. Plans        
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]        
Service cost 1,175 1,127 2,350 2,254
Interest cost 1,145 1,224 2,290 2,448
Expected return on plan assets (1,978) (1,886) (3,956) (3,772)
Amortization of Prior service cost (credit) (6)   (12)  
Amortization of Net actuarial losses recognized 419 573 838 1,146
Net Periodic Benefit (Credit) Cost 755 1,038 1,510 2,076
Postretirement Benefits | U.S. Plans        
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]        
Interest cost 43 57 86 114
Amortization of Prior service cost (credit) (55) (58) (110) (116)
Amortization of Net actuarial losses recognized 6   12  
Net Periodic Benefit (Credit) Cost (6) (1) (12) (2)
Postretirement Benefits | Non-U.S. Plans        
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items]        
Service cost 311 284 622 568
Interest cost 224 222 448 444
Amortization of Net actuarial losses recognized 79 60 158 120
Net Periodic Benefit (Credit) Cost $ 614 $ 566 $ 1,228 $ 1,132