Financial Risk Management - Liquidity Risk - Maturity profile of the insurance contract liabilities (Details) - USD ($) $ in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Financial Risk Management. | ||
| Insurance contract liabilities, undiscounted cash flows | $ 49,785.4 | $ 48,665.2 |
| 1 year or less | ||
| Financial Risk Management. | ||
| Insurance contract liabilities, undiscounted cash flows | 15,067.9 | 14,226.5 |
| One to two years | ||
| Financial Risk Management. | ||
| Insurance contract liabilities, undiscounted cash flows | 9,130.7 | 8,462.3 |
| Two to three years | ||
| Financial Risk Management. | ||
| Insurance contract liabilities, undiscounted cash flows | 6,419.1 | 6,100.6 |
| Three to four years | ||
| Financial Risk Management. | ||
| Insurance contract liabilities, undiscounted cash flows | 4,557.3 | 4,511.5 |
| Four to five years | ||
| Financial Risk Management. | ||
| Insurance contract liabilities, undiscounted cash flows | 3,231.5 | 3,206.0 |
| More than five years | ||
| Financial Risk Management. | ||
| Insurance contract liabilities, undiscounted cash flows | $ 11,378.9 | $ 12,158.3 |