Derivative and Hedging Activities - Narrative (Details)	3 Months Ended
	Jun. 30, 2020 USD ($) counterparty	Mar. 31, 2020 USD ($)
Derivative [Line Items]
Foreign currency cash flow hedge loss to be reclassified during next 12 months	$ 6,000,000
Number of counterparties with concentration of credit risk | counterparty	0
Designated as Hedging Instrument
Derivative [Line Items]
Pretax gain (loss) on derivatives designated for hedge accounting included other comprehensive income	$ 11,000,000
Pretax gain (loss) on derivative instruments	(4,000,000)
Designated as Hedging Instrument | Cash Flow Hedging | Foreign currency forward contracts
Derivative [Line Items]
Notational amount of derivative	450,000,000	$ 455,000,000
Designated as Hedging Instrument | Net Investment Hedging | Foreign currency forward contracts
Derivative [Line Items]
Notational amount of derivative	0
Designated as Hedging Instrument | Net Investment Hedging | Foreign currency denominated debt
Derivative [Line Items]
Notational amount of derivative	1,400,000,000	1,900,000,000
Pretax gain (loss) on derivatives designated for hedge accounting included other comprehensive income	27,000,000
Not Designated as Hedging Instrument | Foreign currency forward contracts
Derivative [Line Items]
Notational amount of derivative	$ 2,100,000,000	$ 2,200,000,000