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v3.20.2

Debt and Financing Arrangements (Details) |  |  |  | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2020 | Apr. 20, 2020 USD ($) | May 06, 2019 USD ($) | Mar. 31, 2021 | Sep. 30, 2020 USD ($) | Jun. 30, 2020 | Sep. 30, 2020 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2020 EUR (€)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
ABL credit facility springing maturity period |  |  |  |  |  |  | 91 days |  |  |
Gain on partial extinguishment of debt |  |  |  |  |  |  | $ 3,000,000 | $ 0 | $ 0 |
Deferred finance fee charges |  |  |  |  |  |  |  | 13,000,000 |  |
Total interest paid |  |  |  |  |  |  | 203,000,000 | 137,000,000 | $ 143,000,000 |
Revolving credit facility |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  | $ 1,250,000,000 |  | 1,250,000,000 |  |  |
Credit facility expansion |  |  |  |  |  |  | 250,000,000 |  |  |
Remaining borrowing capacity |  |  |  |  | 787,000,000 |  | 787,000,000 |  |  |
Letters of credit outstanding, amount |  |  |  |  | 138,000,000 |  | $ 138,000,000 |  |  |
Revolving credit facility | Minimum |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Commitment fee on unused portion of commitments (as percent) |  |  |  |  |  |  | 0.25% |  |  |
Revolving credit facility | Maximum |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Commitment fee on unused portion of commitments (as percent) |  |  |  |  |  |  | 0.375% |  |  |
Revolving credit facility | EURIBOR | Minimum |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Basis spread (as percent) |  |  |  |  |  |  | 1.50% |  |  |
Revolving credit facility | EURIBOR | Maximum |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Basis spread (as percent) |  |  |  |  |  |  | 2.00% |  |  |
Revolving credit facility | North American |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  | 950,000,000 |  | $ 950,000,000 |  |  |
Revolving credit facility | European |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  | 300,000,000 |  | 300,000,000 |  |  |
Letter of credit |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  | $ 150,000,000 |  | $ 150,000,000 |  |  |
Term Loan B - LIBOR plus 4.00% due in 2024 | Maximum |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
First lien secured net leverage ratio |  |  | 1.75 |  |  |  |  |  |  |
Term Loan B - LIBOR plus 4.00% due in 2024 | Term loan |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Basis spread (as percent) |  |  | 4.25% |  |  |  |  |  |  |
Debt instrument, term |  |  | 5 years |  |  |  |  |  |  |
Face amount of debt |  |  | $ 800,000,000 |  |  |  |  |  |  |
Debt instrument period percentage |  |  | 1.00% |  |  |  |  |  |  |
Debt instrument step down rate |  |  | 0.25% |  |  |  |  |  |  |
Incremental term loan | Term loan |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Face amount of debt |  |  | $ 750,000,000 |  |  |  |  |  |  |
7.00% Notes due in 2026 | Senior Notes |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Face amount of debt |  |  | $ 800,000,000 |  |  |  |  |  |  |
Interest rate (as percent) |  |  | 7.00% |  |  |  |  |  |  |
7.00% Notes due in 2026 | Unsecured debt |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate (as percent) |  |  |  |  | 7.00% |  | 7.00% |  |  | 7.00%
Long-term debt, gross |  |  |  |  | $ 800,000,000 |  | $ 800,000,000 | 800,000,000 |  |
4.875% Notes due in 2026 | Unsecured debt |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Face amount of debt |  |  |  |  | $ 900,000,000 |  | $ 900,000,000 |  |  |
Interest rate (as percent) |  |  |  |  | 4.875% |  | 4.875% |  |  | 4.875%
Repayments of unsecured debt |  |  |  |  | $ 103,000,000 |  |  |  |  |
Long-term debt, gross |  |  |  |  | 797,000,000 |  | $ 797,000,000 | 900,000,000 |  |
Gain on partial extinguishment of debt |  |  |  |  | $ 3,000,000 |  |  |  |  |
3.50% Notes due in 2024 | Senior Notes |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Interest rate (as percent) |  | 3.50% |  |  |  |  |  |  |  |
3.50% Notes due in 2024 | Unsecured debt |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Face amount of debt | € |  |  |  |  |  |  |  |  |  | € 1,000,000,000.0
Interest rate (as percent) |  |  |  |  | 3.50% |  | 3.50% |  |  | 3.50%
Long-term debt, gross |  |  |  |  | $ 1,173,000,000 |  | $ 1,173,000,000 | 1,094,000,000 |  |
European Investment Bank Loan - EURIBOR plus 1.58% due in 2022 | EURIBOR |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Basis spread (as percent) |  |  |  |  |  |  | 1.58% |  |  |
European Investment Bank Loan - EURIBOR plus 1.58% due in 2022 | Unsecured debt |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Face amount of debt | € |  |  |  |  |  |  |  |  |  | € 165,000,000
Long-term debt, gross |  |  |  |  | $ 0 |  | $ 0 | $ 180,000,000 |  |
Net leverage to EBITDA multiple | 6.75 |  |  |  | 5.25 | 5.25 |  |  |  |
European Investment Bank Loan - EURIBOR plus 1.58% due in 2022 | Unsecured debt | Forecast |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Net leverage to EBITDA multiple |  |  |  | 4.50 |  |  |  |  |  |
European Investment Bank Loan - EURIBOR plus 1.58% due in 2022 | Unsecured debt | EURIBOR |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Basis spread (as percent) |  |  |  |  |  |  | 1.58% |  |  |
Senior notes due 2025, 9.00% | Senior Notes |  |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |  |
Face amount of debt |  | $ 600,000,000 |  |  |  |  |  |  |  |
Interest rate (as percent) |  | 9.00% |  |  |  |  |  |  |  |
Proceeds from debt, net of issuance costs |  | $ 591,000,000 |  |  |  |  |  |  |  |
Debt issuance costs, gross |  | $ 10,000,000 |  |  |  |  |  |  |  |

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