Investments - Summary of Derivative Instruments Held (Details) - USD ($) $ in Millions |
Sep. 30, 2020 |
Dec. 31, 2019 |
---|---|---|
Designated as Hedging Instrument | Fair Value Hedging | Foreign currency swap contracts | ||
Derivative [Line Items] | ||
Notional value | $ 853 | $ 817 |
Designated as Hedging Instrument | Net Investment Hedging | Foreign currency swap contracts | ||
Derivative [Line Items] | ||
Notional value | 526 | 438 |
Designated as Hedging Instrument | Net Investment Hedging | Foreign currency forward contracts | ||
Derivative [Line Items] | ||
Notional value | 636 | 406 |
Not Designated as Hedging Instrument | Foreign currency forward contracts | ||
Derivative [Line Items] | ||
Notional value | $ 495 | $ 410 |