Derivative Instruments And Hedging Activities - Summary of Notional Amounts of Outstanding Foreign Exchange Forwards (Detail) - Not Designated as Accounting Hedges ₽ in Millions, € in Millions, ₨ in Millions, ¥ in Millions, £ in Millions, $ in Millions, $ in Millions, $ in Millions	Jun. 30, 2020 USD ($)	Jun. 30, 2020 EUR (€)	Jun. 30, 2020 GBP (£)	Jun. 30, 2020 JPY (¥)	Jun. 30, 2020 CAD ($)	Jun. 30, 2020 SGD ($)	Jun. 30, 2020 RUB (₽)	Jun. 30, 2020 INR (₨)	Dec. 31, 2019 USD ($)	Dec. 31, 2019 EUR (€)	Dec. 31, 2019 GBP (£)	Dec. 31, 2019 JPY (¥)	Dec. 31, 2019 CAD ($)	Dec. 31, 2019 SGD ($)	Dec. 31, 2019 RUB (₽)	Dec. 31, 2019 INR (₨)
Contracts to sell USD for GBP
Derivative [Line Items]
Notional Amount	$ 458		£ 369						$ 235		£ 178
Contracts to sell USD for Japanese Yen
Derivative [Line Items]
Notional Amount	23			¥ 2,500					29			¥ 3,200
Contracts to sell USD for Canadian dollars
Derivative [Line Items]
Notional Amount	93				$ 130				83				$ 110
Contracts to sell USD for Singapore dollars
Derivative [Line Items]
Notional Amount	79					$ 112			41					$ 56
Contracts to sell USD for Euros
Derivative [Line Items]
Notional Amount	324	€ 291							421	€ 378
Contracts to sell Euros for GBP
Derivative [Line Items]
Notional Amount		€ 0	£ 0							€ 25	£ 21
Contracts to sell USD for Russian Ruble
Derivative [Line Items]
Notional Amount	8						₽ 580		0						₽ 0
Contracts to sell USD for Indian Rupee
Derivative [Line Items]
Notional Amount	$ 15							₨ 1,200	$ 0							₨ 0