Derivative Instruments And Hedging Activities - Additional Information (Detail) £ in Millions	Dec. 31, 2019 USD ($)	Dec. 31, 2019 EUR (€)	Dec. 31, 2018 USD ($)	Dec. 31, 2018 EUR (€)	Aug. 10, 2017 USD ($)	Aug. 10, 2017 EUR (€)	Aug. 10, 2017 GBP (£)
2021 | Designated as Hedging Instrument | Cross currency swaps
Derivative [Line Items]
Notional Amount		€ 688,000,000
2022 | Designated as Hedging Instrument | Cross currency swaps
Derivative [Line Items]
Notional Amount		438,000,000
2023 | Designated as Hedging Instrument | Cross currency swaps
Derivative [Line Items]
Notional Amount		442,000,000
2024 | Designated as Hedging Instrument | Cross currency swaps
Derivative [Line Items]
Notional Amount		442,000,000
Currency Paid | Net Investment Hedging | Cross currency swaps
Derivative [Line Items]
Notional Amount		2,010,000,000		€ 710,000,000
Currency Received | Net Investment Hedging | Cross currency swaps
Derivative [Line Items]
Notional Amount | $	$ 2,300,000,000		$ 830,000,000
2018 Senior Notes, due 2029 | Cash Flow Hedging | Designated as Hedging Instrument | Treasury Lock
Derivative [Line Items]
Notional Amount | $			$ 250,000,000
2015 Senior Notes | Net Investment Hedging | Designated as Hedging Instrument | Cross currency swaps
Derivative [Line Items]
Notional Amount		500,000,000
0.950% 2019 Senior Note, due 2030 | Net Investment Hedging | Designated as Hedging Instrument | Cross currency swaps
Derivative [Line Items]
Notional Amount		€ 750,000,000
Bureau Van Dijk | Call Option | Foreign Exchange Option
Derivative [Line Items]
Notional Amount						€ 2,700,000,000
Sell | Bureau Van Dijk | Currency Paid | Foreign Currency Forward Contracts to Sell US Dollars for EUR
Derivative [Line Items]
Notional Amount | $					$ 2,800,000,000
Sell | Bureau Van Dijk | Currency Paid | Foreign Currency Forward Contracts To Sell US Dollars for GBP
Derivative [Line Items]
Notional Amount | $					$ 41,000,000
Buy | Bureau Van Dijk | Currency Received | Foreign Currency Forward Contracts to Sell US Dollars for EUR
Derivative [Line Items]
Notional Amount						€ 2,400,000,000
Buy | Bureau Van Dijk | Currency Received | Foreign Currency Forward Contracts To Sell US Dollars for GBP
Derivative [Line Items]
Notional Amount | £							£ 31