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Financial Instruments - Cross-Currency Swap Contract (Details) - Cross-currency swaps € in Millions, ¥ in Millions, $ in Millions | Jun. 30, 2020 EUR (€) | Jun. 30, 2020 USD ($) | Jun. 30, 2020 JPY (¥) | Dec. 31, 2019 EUR (€) | Dec. 31, 2019 USD ($) | Dec. 31, 2019 JPY (¥)
--- | --- | --- | --- | --- | --- | ---
US dollar | Maturity July 2027 |  |  |  |  |  |
Derivative |  |  |  |  |  |
Foreign currency notional amount |  | $ 1,100 |  |  | $ 0 |
US dollar | Maturity March 2025 |  |  |  |  |  |
Derivative |  |  |  |  |  |
Foreign currency notional amount |  | 500 |  |  | 500 |
US dollar | Maturity February 2023 |  |  |  |  |  |
Derivative |  |  |  |  |  |
Foreign currency notional amount |  | $ 100 |  |  | $ 100 |
Euro | Maturity July 2027 |  |  |  |  |  |
Derivative |  |  |  |  |  |
Foreign currency notional amount | € | € 976 |  |  | € 0 |  |
Euro | Maturity March 2025 |  |  |  |  |  |
Derivative |  |  |  |  |  |
Foreign currency notional amount | € | € 450 |  |  | € 450 |  |
Japanese yen | Maturity February 2023 |  |  |  |  |  |
Derivative |  |  |  |  |  |
Foreign currency notional amount | ¥ |  |  | ¥ 10,978 |  |  | ¥ 10,978

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