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v3.23.1

Debt and Financing Activities - Tender Offer and Other Information (Details) - USD ($) $ in Millions |  | 12 Months Ended |
--- | --- | --- | ---
Jul. 23, 2021 | Mar. 31, 2023 | Mar. 31, 2022 | Mar. 31, 2021 | Dec. 15, 2022
Debt Instrument [Line Items] |  |  |  |  |
Payments for debt extinguishments |  | $ 0 | $ 184 | $ 0 |
Loss on debt extinguishment |  | 0 | 191 | $ 0 |
Scheduled principal payments of long-term debt in 2024 |  | 968 |  |  |
Scheduled principal payments of long-term debt in 2025 |  | 39 |  |  |
Scheduled principal payments of long-term debt in 2026 |  | 1,700 |  |  |
Scheduled principal payments of long-term debt in 2027 |  | 1,200 |  |  |
Scheduled principal payments of long-term debt in 2028 |  | 376 |  |  |
Scheduled principal payments of long-term debt, thereafter |  | $ 1,300 |  |  |
Loans payable |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Redemption price (percent) |  | 101.00% |  |  |
2.85% Notes due March 15, 2023 | Loans payable |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Interest rate on debt instruments (percent) | 2.85% | 2.85% |  |  | 2.85%
3.80% Notes due March 15, 2024 | Loans payable |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Interest rate on debt instruments (percent) | 3.80% | 3.80% |  |  |
7.65% Debentures due March 1, 2027 | Loans payable |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Interest rate on debt instruments (percent) | 7.65% | 7.65% |  |  |
3.95% Notes due February 16, 2028 | Loans payable |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Interest rate on debt instruments (percent) | 3.95% | 3.95% |  |  |
4.75% Notes due May 30, 2029 | Loans payable |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Interest rate on debt instruments (percent) | 4.75% | 4.75% |  |  |
6.00% Notes due March 1, 2041 | Loans payable |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Interest rate on debt instruments (percent) | 6.00% | 6.00% |  |  |
4.88% Notes due March 15, 2044 | Loans payable |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Interest rate on debt instruments (percent) | 4.88% | 4.88% |  |  |
Tender Offer Notes | Loans payable |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, repurchase amount | $ 1,100 |  |  |  |
Debt Instrument, repurchased face amount | $ 922 |  |  |  |
Redemption price (percent) | 100.00% |  |  |  |
Payments for debt extinguishments | $ 182 |  |  |  |
Accrued and unpaid interest | $ 14 |  |  |  |
Loss on debt extinguishment |  |  | 191 |  |
Debt premiums |  |  | 182 |  |
Write-off of unamortized debt issuance costs and transaction fees |  |  | $ 9 |  |

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