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EARNINGS PER SHARE AND STOCKHOLDERS' EQUITY (Computations of Basic and Diluted Earnings Per Share) (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 9 Months Ended
Jan. 31, 2021
Jan. 31, 2020
Jan. 31, 2021
Jan. 31, 2020
Earnings Per Share [Abstract]        
Net loss from continuing operations attributable to shareholders $ (231,831) $ (128,026) $ (360,755) $ (457,304)
Amounts allocated to participating securities (210) (169) (592) (468)
Net loss from continuing operations attributable to common shareholders $ (232,041) $ (128,195) $ (361,347) $ (457,772)
Basic weighted average common shares (in shares) 183,438 194,077 188,548 198,064
Potential dilutive shares (in shares) 0 0 0 0
Dilutive weighted average common shares (in shares) 183,438 194,077 188,548 198,064
Loss per share from continuing operations attributable to common shareholders:        
Basic (in usd per share) $ (1.27) $ (0.66) $ (1.92) $ (2.31)
Diluted (in usd per share) $ (1.27) $ (0.66) $ (1.92) $ (2.31)