Revenues (Revenue by Geographic Location) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Hedging gains (losses)	$ 149	$ 176	$ 455
Total revenues	$ 257,637	$ 182,527	$ 161,857
Geographic Area \| Revenue
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of revenue	100.00%	100.00%	100.00%
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues from contract with customer	$ 117,854	$ 85,014	$ 74,843
United States \| Geographic Area \| Revenue
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of revenue	46.00%	47.00%	46.00%
EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues from contract with customer	$ 79,107	$ 55,370	$ 50,645
EMEA \| Geographic Area \| Revenue
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of revenue	31.00%	30.00%	31.00%
APAC
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues from contract with customer	$ 46,123	$ 32,550	$ 26,928
APAC \| Geographic Area \| Revenue
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of revenue	18.00%	18.00%	17.00%
Other Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues from contract with customer	$ 14,404	$ 9,417	$ 8,986
Other Americas \| Geographic Area \| Revenue
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of revenue	5.00%	5.00%	6.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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