Fair Value of Financial Instruments - Schedule of Effective Portion of the Pre-tax Loss (Gain) Reclassified from AOCL into Interest Expense on the Consolidated Statements of Income (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2020	Sep. 30, 2019
Interest Expense
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Pre-Tax Loss (Gain) Reclassified from AOCL into Income (Effective Portion)	$ 1	$ 2	$ (1)