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v3.5.0.2

Debt - Debt Redemption (Details) - Senior Notes | 12 Months Ended
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Sep. 30, 2016
2017 Notes |
Debt Instrument [Line Items] |
Redemption price, additional basis spread (percent) | 0.05%
2020 Notes |
Debt Instrument [Line Items] |
Redemption price, additional basis spread (percent) | 0.10%
2022 Notes |
Debt Instrument [Line Items] |
Redemption price, additional basis spread (percent) | 0.125%
2025 Notes |
Debt Instrument [Line Items] |
Redemption price, additional basis spread (percent) | 0.15%
2035 Notes |
Debt Instrument [Line Items] |
Redemption price, additional basis spread (percent) | 0.20%
2045 Notes |
Debt Instrument [Line Items] |
Redemption price, additional basis spread (percent) | 0.20%

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