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Debt and Financing Activities - Schedule of Long-Term Debt (Details) - USD ($) $ in Millions | Jun. 30, 2024 | Mar. 31, 2024 | Jun. 15, 2023
--- | --- | --- | ---
Debt Instrument [Line Items] |  |  |
Total debt | $ 5,635 | $ 5,629 |
Less: Current portion | 51 | 50 |
Total long-term debt | $ 5,584 | 5,579 |
Loans payable | 0.90% Notes due December 3, 2025 |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate on debt instrument (percent) | 0.90% |  |
Total debt | $ 500 | 500 |
Loans payable | 5.25% Notes due February 15, 2026 |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate on debt instrument (percent) | 1.30% |  |
Total debt | $ 499 | 499 |
Loans payable | 1.30% Notes due August 15, 2026 |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate on debt instrument (percent) | 5.25% |  |
Total debt | $ 499 | 499 |
Loans payable | 7.65% Debentures due March 1, 2027 |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate on debt instrument (percent) | 7.65% |  |
Total debt | $ 150 | 150 |
Loans payable | 3.95% Notes due February 16, 2028 |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate on debt instrument (percent) | 3.95% |  |
Total debt | $ 343 | 343 |
Loans payable | 4.90% Notes due July 15, 2028 |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate on debt instrument (percent) | 4.90% |  | 4.90%
Total debt | $ 399 | 399 |
Loans payable | 4.75% Notes due May 30, 2029 |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate on debt instrument (percent) | 4.75% |  |
Total debt | $ 196 | 196 |
Loans payable | 5.10% Notes due July 15, 2033 |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate on debt instrument (percent) | 5.10% |  | 5.10%
Total debt | $ 597 | 596 |
Loans payable | 6.00% Notes due March 1, 2041 |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate on debt instrument (percent) | 6.00% |  |
Total debt | $ 218 | 218 |
Loans payable | 4.88% Notes due March 15, 2044 |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate on debt instrument (percent) | 4.88% |  |
Total debt | $ 255 | 255 |
Loans payable | 1.50% Euro Notes due November 17, 2025 |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate on debt instrument (percent) | 1.50% |  |
Total debt | $ 642 | 646 |
Loans payable | 1.63% Euro Notes due October 30, 2026 |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate on debt instrument (percent) | 1.63% |  |
Total debt | $ 536 | 540 |
Loans payable | 3.13% Sterling Notes due February 17, 2029 |  |  |
Debt Instrument [Line Items] |  |  |
Interest rate on debt instrument (percent) | 3.13% |  |
Total debt | $ 569 | 568 |
Lease and other obligations |  |  |
Debt Instrument [Line Items] |  |  |
Total debt | $ 232 | $ 220 |

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