Revenue Recognition (Narrative) (Details) - USD ($) $ in Millions |
9 Months Ended | 12 Months Ended | |
|---|---|---|---|
Sep. 30, 2024 |
Dec. 31, 2023 |
Dec. 31, 2022 |
|
| Revenue from Contract with Customer [Abstract] | |||
| Accounts Receivable, Allowance for Credit Loss | $ 17.7 | $ 22.9 | $ 23.9 |
| Current period provisions | 28.2 | 39.8 | |
| Write-offs charged against allowance | (43.0) | (61.6) | |
| Recoveries of amounts previously written off | $ 9.6 | $ 20.8 |
| X | ||||||||||
- Definition Amount of allowance for credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition Amount of increase in allowance for credit loss on accounts receivable, from recovery. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of direct write-downs of accounts receivable charged against the allowance. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of expense (reversal of expense) for expected credit loss on accounts receivable. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- References No definition available.
|