Revenues (Revenue by Geographic Location) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 61,880	$ 38,297	$ 117,194	$ 79,456
Hedging gains (losses)	(7)	151	(116)	200
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	28,208	17,999	53,240	36,869
EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	19,084	11,363	36,115	24,208
APAC
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	11,231	6,945	21,686	14,183
Other Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 3,364	$ 1,839	$ 6,269	$ 3,996
Geographic Concentration Risk | Revenue Benchmark
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of total revenue	100.00%	100.00%	100.00%	100.00%
Geographic Concentration Risk | Revenue Benchmark | United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of total revenue	46.00%	47.00%	45.00%	47.00%
Geographic Concentration Risk | Revenue Benchmark | EMEA
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of total revenue	31.00%	30.00%	31.00%	30.00%
Geographic Concentration Risk | Revenue Benchmark | APAC
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of total revenue	18.00%	18.00%	19.00%	18.00%
Geographic Concentration Risk | Revenue Benchmark | Other Americas
Revenues from External Customers and Long-Lived Assets [Line Items]
Percentage of total revenue	5.00%	5.00%	5.00%	5.00%