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Accounts Receivable - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Mar. 31, 2020 | Mar. 31, 2019 | Dec. 31, 2019 | Jan. 01, 2020
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Accounts receivable, net | $ 1,985.1 |  | $ 2,891.9 |
Accounts receivable, allowance for credit losses | $ 56.1 |  | 35.5 | $ 46.6
Percent accounts receivable outstanding, less than 60 days | 96.00% |  |  |
Account receivable sold under the RPAs | $ 288.3 |  | $ 405.9 |
Fees and financing costs under the RPA | 4.4 | $ 5.8 |  |
Accounts receivable sold under RPAs | 1,800.0 | 2,000.0 |  |
Cash proceeds from sale of accounts receivables | $ 1,700.0 | $ 2,000.0 |  |
Maximum |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Sale price of receivables, percentage of sold amount | 100.00% |  |  |
London Interbank Offered Rate (LIBOR) | Maximum |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Receivable, basis spread on variable rate |  |  | 3.00% |
London Interbank Offered Rate (LIBOR) | Minimum |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Receivable, basis spread on variable rate |  |  | 1.00% |
Accounting Standards Update 2016-13 |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Cumulative effect of change in accounting principle |  |  |  | (11.1)
Retained Earnings | Accounting Standards Update 2016-13 |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |
Cumulative effect of change in accounting principle |  |  |  | $ (11.1)

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