Share-Based Compensation - Narrative (Details) $ in Millions	1 Months Ended		12 Months Ended
	Mar. 31, 2020 USD ($)	May 31, 2018 period shares	Dec. 31, 2021 USD ($) shares	Dec. 31, 2020 USD ($) shares	Dec. 31, 2019 USD ($) shares	Feb. 28, 2021 shares
Class of Stock [Line Items]
Non-cash compensation expense			$ 188	$ 139	$ 139
Allocation of recognized period costs, capitalized amount			$ 13	12	14
Capital shares reserved for future issuance (in shares) | shares			31,600,000
Typical vesting period			3 years
Grants in period (in shares) | shares			500,000
Stock granted, value, net of forfeitures			$ 58
Amount of non-cash compensation remaining in fiscal period			32
Acquisition-related transaction and integration costs			102	105	$ 2
Bridge2 Solutions
Class of Stock [Line Items]
Acquisition-related transaction and integration costs			$ 31	10
Bakkt, LLC | Bridge2 Solutions
Class of Stock [Line Items]
Capital call commitment amount	$ 300			$ 300
Employee stock option
Class of Stock [Line Items]
Awards exercise period			10 years
Compensation cost not yet recognized			$ 8
Cost not yet recognized, period for recognition			1 year 3 months 18 days
Employee stock option | Minimum
Class of Stock [Line Items]
Award vesting period			3 years
Stock options granted, expiration period			14 days
Employee stock option | Maximum
Class of Stock [Line Items]
Award vesting period			4 years
Stock options granted, expiration period			60 days
Restricted Stock
Class of Stock [Line Items]
Grants in period (in shares) | shares			1,679,000,000	1,697,000,000	1,758,000,000
Time Based And Performance Based Restricted Stock
Class of Stock [Line Items]
Compensation cost not yet recognized			$ 161
Cost not yet recognized, period for recognition			1 year 6 months
Time Based Restricted Units
Class of Stock [Line Items]
Grants in period (in shares) | shares			1,196,000	910,000	997,000
Performance Based Restricted Stock Units | Maximum
Class of Stock [Line Items]
Shares reserved for future issuance (in shares) | shares						700,000
Employee stock
Class of Stock [Line Items]
Number of shares authorized (up to) (in shares) | shares		25,000,000
Percentage in increment of eligible pay		1.00%
Percentage of maximum contribution of eligible pay		25.00%
Maximum number of shares per employee (in shares) | shares		25,000
Shares employees are eligible for in each offering period (in shares) | shares		1,250
Number of offering periods per year | period		2
Percentage of purchase price of common stock			85.00%
Stock-based compensation			$ 11	$ 8	$ 7