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v3.20.2

Derivative Instruments and Hedging Activities (Details) ¥ in Millions | 3 Months Ended | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 31, 2020 USD ($) instrument | Sep. 30, 2020 USD ($) instrument | Sep. 30, 2019 USD ($) instrument | Sep. 30, 2018 USD ($) | Sep. 30, 2020 EUR (€) instrument | Sep. 30, 2020 JPY (¥) instrument | Dec. 31, 2019 JPY (¥) | Sep. 30, 2019 JPY (¥) instrument | Sep. 30, 2018 EUR (€) instrument
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Percentage of foreign exchange rate exposure hedged, minimum |  | 70.00% |  |  | 70.00% | 70.00% |  |  |
Percentage of foreign exchange rate exposure hedged, maximum |  | 90.00% |  |  | 90.00% | 90.00% |  |  |
Cash collateral pledged |  | $ 0 | $ 0 |  |  |  |  |  |
Cash collateral received |  | 0 | 0 |  |  |  |  |  |
Reclassification out of accumulated other comprehensive income |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Realized and unrealized gains (losses) on derivatives | $ 2,000,000 |  |  |  |  |  |  |  |
Cross-currency interest rate swaps |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Proceeds from derivative instrument, investing activities | $ 10,000,000 |  |  |  |  |  |  |  |
Interest rate cap |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Notional value of derivative asset |  | $ 200,000,000 |  |  |  |  |  |  |
Number of instruments | instrument |  | 2 |  |  | 2 | 2 |  |  |
Foreign currency exchange derivatives | Yanfeng |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Notional value of derivative asset | ¥ |  |  |  |  |  | ¥ 1,600 |  |  |
China | Foreign currency exchange derivatives |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Notional value of derivative asset | ¥ |  |  |  |  |  |  | ¥ 950 |  |
Net investment hedging | Foreign currency exchange derivatives |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Effective portion of pretax gains (loss) related to net investment hedges |  | $ (84,000,000) | 74,000,000 | $ 31,000,000 |  |  |  |  |
Gains (losses) reclassified into income for net investment hedges |  | $ 0 | $ 0 | 0 |  |  |  |  |
Net investment hedging | Europe | Cross-currency interest rate swaps |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Notional value of derivative asset | € |  |  |  |  |  |  |  |  | € 160,000,000
Number of instruments | instrument | 1 | 0 |  |  | 0 | 0 |  |  | 2
Net investment hedging | Japan | Cross-currency interest rate swaps |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Notional value of derivative asset | ¥ |  |  |  |  |  | ¥ 11,000 |  | ¥ 11,000 |
Number of instruments | instrument |  | 1 | 1 |  | 1 | 1 |  | 1 |
Cash flow hedging |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Gain (loss) for ineffective portion of cash flow hedge |  | $ (2,000,000) |  |  |  |  |  |  |
Cash flow hedging | Foreign currency exchange derivatives |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Gain (loss) for ineffective portion of cash flow hedge |  | $ 0 | $ 0 | $ 0 |  |  |  |  |
Long-term debt | Derivatives and Hedging Activities Designated as Hedging Instruments under ASC 815 |  |  |  |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |  |  |  |
Notional value of derivative liability | € |  |  |  |  | € 1,000,000,000.0 |  |  |  |
Interest rate (as percent) |  | 3.50% |  |  | 3.50% | 3.50% |  |  |

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