Debt - Senior Notes (Details) - Senior Notes |
Sep. 30, 2018 |
---|---|
6.00% Senior Notes, due 2026 | |
Debt Instrument [Line Items] | |
Interest rate | 6.00% |
5.875% Senior Notes, due 2024 | |
Debt Instrument [Line Items] | |
Interest rate | 5.875% |
5.125% Senior Notes, due 2023 | |
Debt Instrument [Line Items] | |
Interest rate | 5.125% |
5.875% Senior Notes due 2022 | |
Debt Instrument [Line Items] | |
Interest rate | 5.875% |