Derivative Instruments - Summary of Fair Value Measurements (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Derivative [Line Items]
Derivatives assets	$ 13	$ 0
Derivatives liabilities	719	869
Derivatives designated as cash flow hedges | Interest rate | Other liabilities, net
Derivative [Line Items]
Derivatives liabilities	279	430
Derivatives designated as cash flow hedges | Foreign currency | Other accrued liabilities
Derivative [Line Items]
Derivatives liabilities	4	5
Derivatives designated as net investment hedges | Foreign currency | Other assets, net
Derivative [Line Items]
Derivatives assets	13	0
Derivatives designated as net investment hedges | Foreign currency | Other liabilities, net
Derivative [Line Items]
Derivatives liabilities	$ 436	$ 434