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Financing arrangements - Schedule of Borrowings (Details) $ in Millions | Dec. 31, 2024 USD ($) | Dec. 31, 2024 EUR (€) | Dec. 31, 2024 GBP (£) | Dec. 31, 2023 USD ($) | Mar. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
--- | --- | --- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |  |  |
Unamortized bond discounts, premiums and issuance costs, net | $ (1,360) |  |  | $ (1,420) |  |
Fair value adjustments | (343) |  |  | (314) |  |
Other | 24 |  |  | 17 |  |
Total carrying value of debt | 60,099 |  |  | 64,613 |  |
Less current portion | (3,550) |  |  | (1,443) |  |
Total long-term debt | 56,549 |  |  | 63,170 |  |
Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Principal Amount | 0 |  |  |  | $ 24,000 | $ 7,000
Total principal amount of debt | 61,778 |  |  | 66,330 |  |
Total carrying value of debt | $ 58,300 |  |  | 60,600 |  |
3.625% notes due 2024 (3.625% 2024 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 3.625% | 3.625% | 3.625% |  |  |
Total principal amount of debt | $ 0 |  |  | 1,400 |  |
1.90% notes due 2025 (1.90% 2025 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 1.90% | 1.90% | 1.90% |  |  |
Total principal amount of debt | $ 500 |  |  | 500 |  |
5.25% notes due 2025 (5.25% 2025 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 5.25% | 5.25% | 5.25% |  |  |
Principal Amount |  |  |  |  | 2,000 |
Total principal amount of debt | $ 2,000 |  |  | 2,000 |  |
Term loan due April 2025 | Secured Debt |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Total principal amount of debt | $ 0 |  |  | 2,000 |  |
3.125% notes due 2025 (3.125% 2025 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 3.125% | 3.125% | 3.125% |  |  |
Total principal amount of debt | $ 1,000 |  |  | 1,000 |  |
2.00% €750 million notes due 2026 (2.00% 2026 euro Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 2.00% | 2.00% | 2.00% |  |  |
Principal Amount | € |  | € 750,000,000 |  |  |  |
Total principal amount of debt | $ 777 |  |  | 828 |  |
5.507% notes due 2026 (5.507% 2026 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 5.507% | 5.507% | 5.507% |  |  |
Principal Amount |  |  |  |  | 1,500 |
Total principal amount of debt | $ 1,500 |  |  | 1,500 |  |
2.60% notes due 2026 (2.60% 2026 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 2.60% | 2.60% | 2.60% |  |  |
Total principal amount of debt | $ 1,250 |  |  | 1,250 |  |
Term loan due October 2026 | Secured Debt |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Total principal amount of debt | $ 1,800 |  |  | 2,000 |  |
5.50% £475 million notes due 2026 (5.50% 2026 pound sterling Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 5.50% | 5.50% | 5.50% |  |  |
Principal Amount | £ |  |  | £ 475,000,000 |  |  |
Total principal amount of debt | $ 595 |  |  | 605 |  |
2.20% notes due 2027 (2.20% 2027 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 2.20% | 2.20% | 2.20% |  |  | 2.20%
Total principal amount of debt | $ 1,724 |  |  | 1,724 |  |
3.20% notes due 2027 (3.20% 2027 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 3.20% | 3.20% | 3.20% |  |  |
Total principal amount of debt | $ 1,000 |  |  | 1,000 |  |
5.15% notes due 2028 (5.15% 2028 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 5.15% | 5.15% | 5.15% |  |  |
Principal Amount |  |  |  |  | 3,750 |
Total principal amount of debt | $ 3,750 |  |  | 3,750 |  |
1.65% notes due in 2028 (1.65% 2028 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 1.65% | 1.65% | 1.65% |  |  | 1.65%
Total principal amount of debt | $ 1,234 |  |  | 1,234 |  |
3.00% notes due 2029 (3.00% 2029 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 3.00% | 3.00% | 3.00% |  |  | 3.00%
Principal Amount |  |  |  |  |  | $ 750
Total principal amount of debt | $ 750 |  |  | 750 |  |
4.05% notes due 2029 (4.05% 2029 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 4.05% | 4.05% | 4.05% |  |  | 4.05%
Principal Amount |  |  |  |  |  | $ 1,250
Total principal amount of debt | $ 1,250 |  |  | 1,250 |  |
4.00% £700 million notes due 2029 (4.00% 2029 pound sterling Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 4.00% | 4.00% | 4.00% |  |  |
Principal Amount | £ |  |  | £ 700,000,000 |  |  |
Total principal amount of debt | $ 876 |  |  | 892 |  |
2.45% notes due 2030 (2.45% 2030 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 2.45% | 2.45% | 2.45% |  |  |
Total principal amount of debt | $ 1,250 |  |  | 1,250 |  |
5.25% notes due 2030 (5.25% 2030 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 5.25% | 5.25% | 5.25% |  |  |
Principal Amount |  |  |  |  | 2,750 |
Total principal amount of debt | $ 2,750 |  |  | 2,750 |  |
2.30% notes due 2031 (2.30% 2031 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 2.30% | 2.30% | 2.30% |  |  |
Total principal amount of debt | $ 1,250 |  |  | $ 1,250 |  |
2.00% notes due 2032 (2.00% 2032 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 2.00% | 2.00% | 2.00% | 2.00% |  | 2.00%
Total principal amount of debt | $ 1,001 |  |  | $ 1,001 |  |
3.35% notes due 2032 (3.35% 2032 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 3.35% | 3.35% | 3.35% |  |  | 3.35%
Principal Amount |  |  |  |  |  | $ 1,000
Total principal amount of debt | $ 1,000 |  |  | 1,000 |  |
4.20% notes due 2033 (4.20% 2033 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 4.20% | 4.20% | 4.20% |  |  | 4.20%
Principal Amount |  |  |  |  |  | $ 750
Total principal amount of debt | $ 750 |  |  | 750 |  |
5.25% notes due 2033 (5.25% 2033 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 5.25% | 5.25% | 5.25% |  |  |
Principal Amount |  |  |  |  | 4,250 |
Total principal amount of debt | $ 4,250 |  |  | 4,250 |  |
6.375% notes due 2037 (6.375% 2037 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 6.375% | 6.375% | 6.375% |  |  |
Total principal amount of debt | $ 478 |  |  | 478 |  |
6.90% notes due 2038 (6.90% 2038 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 6.90% | 6.90% | 6.90% |  |  |
Total principal amount of debt | $ 254 |  |  | 254 |  |
6.40% notes due 2039 (6.40% 2039 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 6.40% | 6.40% | 6.40% |  |  |
Total principal amount of debt | $ 333 |  |  | $ 333 |  |
3.15% notes due 2040 (3.15% 2040 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 3.15% | 3.15% | 3.15% | 3.15% |  |
Total principal amount of debt | $ 1,668 |  |  | $ 1,803 |  |
5.75% notes due 2040 (5.75% 2040 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 5.75% | 5.75% | 5.75% |  |  |
Total principal amount of debt | $ 373 |  |  | $ 373 |  |
2.80% notes due 2041 (2.80% 2041 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 2.80% | 2.80% | 2.80% | 2.80% |  | 2.80%
Total principal amount of debt | $ 776 |  |  | $ 949 |  |
4.95% notes due 2041 (4.95% 2041 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 4.95% | 4.95% | 4.95% |  |  |
Total principal amount of debt | $ 600 |  |  | 600 |  |
5.15% notes due 2041 (5.15% 2041 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 5.15% | 5.15% | 5.15% |  |  |
Total principal amount of debt | $ 729 |  |  | 729 |  |
5.65% notes due 2042 (5.65% 2042 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 5.65% | 5.65% | 5.65% |  |  |
Total principal amount of debt | $ 415 |  |  | 415 |  |
5.60% notes due 2043 (5.60% 2043 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 5.60% | 5.60% | 5.60% |  |  |
Principal Amount |  |  |  |  | 2,750 |
Total principal amount of debt | $ 2,750 |  |  | 2,750 |  |
5.375% notes due 2043 (5.375% 2043 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 5.375% | 5.375% | 5.375% |  |  |
Total principal amount of debt | $ 185 |  |  | 185 |  |
4.40% notes due 2045 (4.40% 2045 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 4.40% | 4.40% | 4.40% |  |  |
Total principal amount of debt | $ 2,250 |  |  | 2,250 |  |
4.563% notes due 2048 (4.563% 2048 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 4.563% | 4.563% | 4.563% |  |  |
Total principal amount of debt | $ 1,415 |  |  | $ 1,415 |  |
3.375% notes due 2050 (3.375% 2050 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 3.375% | 3.375% | 3.375% | 3.375% |  |
Total principal amount of debt | $ 1,764 |  |  | $ 2,132 |  |
4.663% notes due 2051 (4.663% 2051 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 4.663% | 4.663% | 4.663% |  |  |
Total principal amount of debt | $ 3,541 |  |  | $ 3,541 |  |
3.00% notes due 2052 (3.00% 2052 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 3.00% | 3.00% | 3.00% | 3.00% |  | 3.00%
Total principal amount of debt | $ 890 |  |  | $ 999 |  |
4.20% notes due 2052 (4.20% 2052 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 4.20% | 4.20% | 4.20% | 4.20% |  | 4.20%
Principal Amount |  |  |  |  |  | $ 1,000
Total principal amount of debt | $ 895 |  |  | $ 950 |  |
4.875% notes due 2053 (4.875% 2053 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 4.875% | 4.875% | 4.875% |  |  | 4.875%
Principal Amount |  |  |  |  |  | $ 1,000
Total principal amount of debt | $ 1,000 |  |  | 1,000 |  |
5.65% notes due 2053 (5.65% 2053 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 5.65% | 5.65% | 5.65% |  |  |
Principal Amount |  |  |  |  | 4,250 |
Total principal amount of debt | $ 4,250 |  |  | 4,250 |  |
2.77% notes due 2053 (2.77% 2053 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 2.77% | 2.77% | 2.77% |  |  |
Total principal amount of debt | $ 940 |  |  | $ 940 |  |
4.40% notes due 2062 (4.40% 2062 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 4.40% | 4.40% | 4.40% | 4.40% |  | 4.40%
Principal Amount |  |  |  |  |  | $ 1,250
Total principal amount of debt | $ 1,165 |  |  | $ 1,200 |  |
5.75% notes due 2063 (5.75% 2063 Notes) | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Interest rate, stated percentage | 5.75% | 5.75% | 5.75% |  |  |
Principal Amount |  |  |  |  | $ 2,750 |
Total principal amount of debt | $ 2,750 |  |  | 2,750 |  |
Other notes due 2097 | Notes |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |
Total principal amount of debt | $ 100 |  |  | $ 100 |  |

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