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Financial Instruments - Foreign Currency Derivative Contract (Details) - Foreign currency € in Millions, ₩ in Millions, ¥ in Millions, ¥ in Millions, £ in Millions, zł in Millions, Ft in Millions, $ in Millions, $ in Millions | Sep. 30, 2020 EUR (€) | Sep. 30, 2020 USD ($) | Sep. 30, 2020 GBP (£) | Sep. 30, 2020 CNY (¥) | Sep. 30, 2020 HUF (Ft) | Sep. 30, 2020 JPY (¥) | Sep. 30, 2020 PLN (zł) | Sep. 30, 2020 KRW (₩) | Sep. 30, 2020 MXN ($) | Dec. 31, 2019 EUR (€) | Dec. 31, 2019 USD ($) | Dec. 31, 2019 GBP (£) | Dec. 31, 2019 CNY (¥) | Dec. 31, 2019 HUF (Ft) | Dec. 31, 2019 JPY (¥) | Dec. 31, 2019 PLN (zł) | Dec. 31, 2019 KRW (₩) | Dec. 31, 2019 MXN ($)
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Brazilian real | Maturity January 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency notional amount | € 1 | $ 3 |  |  |  |  |  |  |  | € 1 | $ 0 |  |  |  |  |  |  |
British pound | Maturity March 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency notional amount | € | 11 |  |  |  |  |  |  |  |  | 9 |  |  |  |  |  |  |  |
British pound | Maturity March 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency notional amount |  | 0 |  |  |  |  |  |  |  |  | 4 |  |  |  |  |  |  |
Chinese renminbi | Maturity July 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency notional amount |  | 51 |  |  |  |  |  |  |  |  | 2 |  |  |  |  |  |  |
Euro | Maturity January 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency notional amount |  |  | £ 1 |  | Ft 744 |  |  |  |  |  |  | £ 0 |  | Ft 0 |  |  |  |
Euro | Maturity October 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency notional amount | ¥ |  |  |  | ¥ 1 |  |  |  |  |  |  |  |  | ¥ 0 |  |  |  |  |
Euro | Maturity December 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency notional amount |  | 3 |  |  |  | ¥ 85 | zł 125 |  |  |  | 18 |  |  |  | ¥ 383 | zł 0 |  |
Indian rupee | Maturity October 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency notional amount |  | 2 |  |  |  | 32 |  |  |  |  | 0 |  |  |  | 0 |  |  |
Japanese yen | Maturity December 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency notional amount |  | 1 |  |  |  |  |  | ₩ 1,255 |  |  | 0 |  |  |  |  |  | ₩ 0 |
Korean won | Maturity December 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency notional amount | 3 | 15 |  |  |  | 169 |  |  |  | 13 | 4 |  |  |  | 409 |  |  |
Swedish krona | Maturity January 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency notional amount | € | 0 |  |  |  |  |  |  |  |  | 3 |  |  |  |  |  |  |  |
Thai baht | Maturity December 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency notional amount |  | $ 1 |  |  |  |  |  |  |  |  | $ 0 |  |  |  |  |  |  |
US dollar | Maturity March 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency notional amount |  |  |  |  |  |  |  |  | $ 188 |  |  |  |  |  |  |  |  | $ 0
US dollar | Maturity October 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency notional amount | ¥ |  |  |  |  |  | ¥ 500 |  |  |  |  |  |  |  |  | ¥ 0 |  |  |
US dollar | Maturity December 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency notional amount | € | € 79 |  |  |  |  |  |  |  |  | € 14 |  |  |  |  |  |  |  |
US dollar | Maturity April 2021 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Derivative |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Foreign currency notional amount | ₩ |  |  |  |  |  |  |  | ₩ 15,000 |  |  |  |  |  |  |  |  | ₩ 0 |

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