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Short-Term Borrowings and Long-Term Debt (Tables)
3 Months Ended
Jun. 30, 2020
Debt Disclosure [Abstract]  
Schedule of Long-term Debt Instruments [Table Text Block]
Long-term debt, net, consists of the following:
 
 
June 30, 2020
 
March 31, 2020
 
 
Carrying Value
 
Unamortized Discount (Premium)
 
Unamortized Debt Issuance Costs
 
Maturity Amount
 
Carrying Value
3.95% Senior Notes due July 2024
 
$
249,035

 
$
184

 
$
781

 
$
250,000

 
$
248,976

4.75% Senior Notes due March 2026
 
447,963

 

 
2,037

 
450,000

 
447,875

5.625% Senior Notes due January 2044
 
548,119

 
(2,877
)
 
4,758

 
550,000

 
548,099

6.375% Junior Notes due March 2056
 
242,716

 

 
7,284

 
250,000

 
242,665

5.45% Junior Notes due September 2056
 
485,221

 

 
14,779

 
500,000

 
485,118

Total
 
$
1,973,054

 
$
(2,693
)
 
$
29,639

 
$
2,000,000

 
$
1,972,733