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Derivative instruments and hedging activities - Notional Amounts (Details) € in Millions, £ in Millions, $ in Millions | Jun. 30, 2024 USD ($) derivative | Jun. 30, 2024 EUR (€) derivative | Jun. 30, 2024 GBP (£) derivative
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Derivatives designated as hedging instruments | Cash Flow Hedging |  |  |
Derivative [Line Items] |  |  |
Derivative, number of instruments | derivative | 5 | 5 | 5
Derivative, notional amount | $ | $ 2,500 |  |
Interest rate swap | Derivatives designated as hedging instruments | Cash Flow Hedging |  |  |
Derivative [Line Items] |  |  |
Derivative, number of instruments | derivative | 2 | 2 | 2
Derivative, notional amount | $ | $ 1,000 |  |
Interest rate cap | Derivatives designated as hedging instruments | Cash Flow Hedging |  |  |
Derivative [Line Items] |  |  |
Derivative, number of instruments | derivative | 3 | 3 | 3
Derivative, notional amount | $ | $ 1,500 |  |
Interest rate cap | Derivatives NOT designated as hedging instruments |  |  |
Derivative [Line Items] |  |  |
Derivative, number of instruments | derivative | 7 | 7 | 7
Derivative, notional amount | $ | $ 1,320 |  |
Buy EUR/Sell GBP forward | Derivatives designated as hedging instruments | Cash Flow Hedging |  |  |
Derivative [Line Items] |  |  |
Derivative, notional amount |  | € 24 | £ 21
Buy USD/Sell GBP forward | Derivatives designated as hedging instruments | Cash Flow Hedging |  |  |
Derivative [Line Items] |  |  |
Derivative, notional amount | $ 5 |  | £ 4

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