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Non-current bank credit lines and loan facilities - Narrative (Details) | Sep. 27, 2021 USD ($) | Jul. 01, 2021 USD ($) | Dec. 08, 2020 USD ($) tranche | Sep. 30, 2021 USD ($) | Dec. 31, 2020 USD ($)
--- | --- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |  |
Total debt |  |  |  | $ 6,001,213,000 | $ 350,000,000
Number of tranches | tranche |  |  | 2 |  |
Debt at fair value |  |  |  | 6,035,100,000 |
Senior Secured Notes |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Amortization rate of debt instrument |  | 2.875% |  |  |
Term loan |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Repayments of secured debt | $ 13,800,000 |  |  |  |
Term loan | Secured debt |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt discount |  |  |  | 27,600,000 |
Line of credit facility, principal amount |  | $ 5,515,000,000 |  |  |
Amortization rate of debt instrument |  | 1.00% |  |  |
Total debt |  |  |  | 5,501,213,000 | 0
Periodic interest payment | $ 40,400,000 |  |  |  |
Term loan | Secured debt | Variable rate component one | Base rate |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Basis spread on variable rate |  | 1.50% |  |  |
Term loan | Secured debt | Variable rate component two |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
First lien net leverage ratio |  | 4.00 |  |  |
Term loan | Secured debt | Variable rate component two | London Interbank Offered Rate (LIBOR) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Basis spread on variable rate |  | 2.50% |  |  |
Variable rate, step down percentage |  | 0.25% |  |  |
Variable rate floor percentage |  | 0.50% |  |  |
Revolving loan facility | Line of credit | Revolving loan facility |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Line of credit facility, principal amount |  | $ 300,000,000 |  |  |
Total debt |  |  |  | $ 0 |
Revolving loan facility | Line of credit | Revolving loan facility | Variable rate component one | Base rate |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Basis spread on variable rate |  | 0.60% |  |  |
Revolving loan facility | Line of credit | Revolving loan facility | Variable rate component one | Base rate | Minimum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Basis spread on variable rate |  | 1.00% |  |  |
Revolving loan facility | Line of credit | Revolving loan facility | Variable rate component one | Base rate | Maximum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Basis spread on variable rate |  | 0.25% |  |  |
Revolving loan facility | Line of credit | Revolving loan facility | Variable rate component two | London Interbank Offered Rate (LIBOR) |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Basis spread on variable rate |  | 1.60% |  |  |
Revolving loan facility | Line of credit | Revolving loan facility | Variable rate component two | London Interbank Offered Rate (LIBOR) | Minimum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Basis spread on variable rate |  | 2.00% |  |  |
Revolving loan facility | Line of credit | Revolving loan facility | Variable rate component two | London Interbank Offered Rate (LIBOR) | Maximum |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Basis spread on variable rate |  | 1.25% |  |  |
Senior Secured Notes | Senior Secured Notes |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Amortization rate of debt instrument |  |  |  | 2.875% |
Total debt |  |  |  | $ 500,000,000 | 0
Debt instrument, principal amount |  | $ 500,000,000 |  |  |
Senior Notes 2020 | 2020 Senior Notes |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Debt instrument, principal amount |  |  | $ 350,000,000 |  |
Effective interest rate |  |  | 2.41% |  |
Repayments of long-term debt |  | $ 364,000,000 |  |  |
Series A notes | 2020 Senior Notes |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Amortization rate of debt instrument |  |  | 2.32% |  |
Total debt |  |  | $ 275,000,000 | 0 | 275,000,000
Series B notes | 2020 Senior Notes |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |
Amortization rate of debt instrument |  |  | 2.43% |  |
Total debt |  |  |  | $ 0 | $ 75,000,000
Debt instrument, principal amount |  |  | $ 75,000,000 |  |

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