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Goodwill, Customer Relationships and Other Intangible Assets - Goodwill, Customer Relationships, and Other Intangible Assets (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | --- | ---
Goodwill [Line Items] |  |  |
Goodwill | $ 1,964,000 |  | $ 1,964,000
Indefinite-lived intangible assets | 9,000 |  | 9,000
Total other intangible assets, net | 5,127,000 |  | 5,470,000
Customer Relationships |  |  |
Goodwill [Line Items] |  |  |
Finite-lived intangible assets, net | 3,501,000 |  | 3,811,000
Accumulated amortization | 4,201,000 |  | 4,248,000
Capitalized Software |  |  |
Goodwill [Line Items] |  |  |
Finite-lived intangible assets, net | 1,538,000 |  | 1,564,000
Accumulated amortization | 4,017,000 |  | 4,045,000
Trade Names, Patents and Other |  |  |
Goodwill [Line Items] |  |  |
Finite-lived intangible assets, net | 79,000 |  | 86,000
Accumulated amortization | $ 79,000 |  | $ 72,000
Fully Amortized and Retired Customer Relationships |  |  |
Goodwill [Line Items] |  |  |
Gross carrying value |  | $ 352,000 |
Fully Amortized and Retired Capitalized Software |  |  |
Goodwill [Line Items] |  |  |
Gross carrying value |  | $ 153,000 |

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