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Supplemental Cash Flow Information - Additional Information (Details) - USD ($) $ in Millions | Mar. 31, 2020 | Mar. 19, 2020 | Dec. 31, 2019
--- | --- | --- | ---
Restricted Cash and Cash Equivalents Items [Line Items] |  |  |
Amount deposited with trustee, sufficient to fully pay redemption price, reported in restricted cash in current assets on balance sheet | $ 487.3 |  | $ 0.0
Senior Notes | The Notes |  |  |
Restricted Cash and Cash Equivalents Items [Line Items] |  |  |
Amount deposited with trustee, sufficient to fully pay redemption price, reported in restricted cash in current assets on balance sheet | 487.3 | $ 487.3 |
Principal Amount Due | Senior Notes | The Notes |  |  |
Restricted Cash and Cash Equivalents Items [Line Items] |  |  |
Amount deposited with trustee, sufficient to fully pay redemption price, reported in restricted cash in current assets on balance sheet | $ 440.0 |  |

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