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v3.19.1

Long-Term Debt - Debt Redemption (Details) | 3 Months Ended
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Mar. 31, 2019
5.0% Notes | Period One |
Debt Instrument, Redemption [Line Items] |
Redemption percentage of principal amount | 102.50%
5.0% Notes | Period Two |
Debt Instrument, Redemption [Line Items] |
Redemption percentage of principal amount | 101.667%
5.0% Notes | Period Three |
Debt Instrument, Redemption [Line Items] |
Redemption percentage of principal amount | 100.833%
5.0% Notes | Period Four |
Debt Instrument, Redemption [Line Items] |
Redemption percentage of principal amount | 100.00%
6.125% Notes | Period One |
Debt Instrument, Redemption [Line Items] |
Redemption percentage of principal amount | 103.063%
6.125% Notes | Period Two |
Debt Instrument, Redemption [Line Items] |
Redemption percentage of principal amount | 102.042%
6.125% Notes | Period Three |
Debt Instrument, Redemption [Line Items] |
Redemption percentage of principal amount | 101.021%
6.125% Notes | Period Four |
Debt Instrument, Redemption [Line Items] |
Redemption percentage of principal amount | 100.00%

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