v3.25.4
Debt (Tables)
 9 Months Ended
Dec. 31, 2025
Debt Disclosure [Abstract]  
Schedule of Outstanding Debt, Weighted Average Contractual Interest Rates and Range of Contractual Interest Rates
The Company issues debt in various currencies with floating or fixed interest rates. Outstanding debt, net of discounts and fees, weighted average contractual interest rates and range of contractual interest rates were as follows:
 
Weighted average
contractual interest rate (1)
Contractual
interest rate ranges
December 31, 2025March 31, 2025December 31, 2025March 31, 2025December 31, 2025March 31, 2025
 (U.S. dollars in millions)    
Unsecured debt:      
Commercial paper$4,341 $6,022 3.86 %4.36 %
2.40 - 4.23%
2.73 - 4.70%
Related party debt— 1,800 — %4.59 %
— - —%
4.59 - 4.60%
Bank loans2,219 2,100 3.79 %4.56 %
3.05 - 4.60%
3.59 - 5.27%
Public MTN Program41,365 37,153 3.97 %4.02 %
0.30 - 5.85%
0.30 - 5.85%
Other debt3,455 3,088 3.51 %3.53 %
1.34 - 5.73%
1.34 - 5.73%
Total unsecured debt51,380 50,163 
Secured debt14,433 12,384 4.49 %4.77 %
3.16 - 5.67%
0.88 - 5.87%
Total debt$65,813 $62,547 
_______________________
(1)Weighted average contractual interest rates for commercial paper are bond equivalent yields. Contractual interest rates approximate effective yields. Weighted average contractual interest rate of short-term debt was 3.95% and 4.54% as of December 31, 2025 and March 31, 2025, respectively.