Derivative Instruments - Summary of Fair Value Measurements (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Derivative [Line Items]
Derivatives assets	$ 18	$ 29
Derivatives liabilities	593	343
Derivatives designated as cash flow hedges | Interest rate | Other assets, net
Derivative [Line Items]
Derivatives assets	0	7
Derivatives designated as cash flow hedges | Interest rate | Other liabilities, net
Derivative [Line Items]
Derivatives liabilities	490	175
Derivatives designated as cash flow hedges | Foreign currency | Other accrued liabilities
Derivative [Line Items]
Derivatives liabilities	1	2
Derivatives designated as net investment hedges | Foreign currency | Other assets, net
Derivative [Line Items]
Derivatives assets	18	22
Derivatives designated as net investment hedges | Foreign currency | Other liabilities, net
Derivative [Line Items]
Derivatives liabilities	$ 102	$ 166