Business Combinations (Intangible Assets Acquired) (Details) - USD ($) $ in Millions	1 Months Ended	6 Months Ended
	Jun. 30, 2020	Jul. 31, 2020
Business Acquisition [Line Items]
Estimated useful lives (in years)		5 years 6 months
Developed technology
Business Acquisition [Line Items]
Estimated useful lives (in years)		3 years 7 months 6 days
Customer relationships
Business Acquisition [Line Items]
Estimated useful lives (in years)		7 years 2 months 12 days
Vlocity
Business Acquisition [Line Items]
Total intangible assets subject to amortization	$ 473
Vlocity | Developed technology
Business Acquisition [Line Items]
Total intangible assets subject to amortization	$ 174
Estimated useful lives (in years)	4 years
Vlocity | Customer relationships
Business Acquisition [Line Items]
Total intangible assets subject to amortization	$ 299
Estimated useful lives (in years)	8 years