Benefit Plans - Summary of Equity-Based Compensation - (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Retirement Benefits [Abstract]
Equity-based compensation expense	$ 320	$ 353	$ 165
Income tax benefit from equity-based compensation expense	75	84	38
Intrinsic value of options exercised, and RSUs and PSUs that vested during the year	474	412	216
Grant date fair value of equity-based awards that vested during the year	395	420	134
Unrecognized compensation cost related to equity-based awards	$ 254	$ 234	$ 274
Weighted-average life over which compensation cost is expected to be recognized	2 years 6 months	2 years 3 months 18 days	2 years 3 months 18 days

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Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Amount of tax benefit for recognition of expense of award under share-based payment arrangement.

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Amount of noncash expense for share-based payment arrangement.

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Intrinsic value of vested award under share-based payment arrangement. Excludes share and unit options.

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