Intangible Assets Including Goodwill - Intangible Assets by Class (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Intangible asset balances by major asset class
Gross Carrying Amount	$ 17,604.0	$ 19,031.0
Accumulated Amortization	(6,032.0)	(6,520.0)
Net Carrying Amount	11,571.0	12,511.0
Amount of foreign currency translation increase (decrease)	(235.0)	(221.0)
Capitalized software
Intangible asset balances by major asset class
Gross Carrying Amount	1,705.0	1,696.0
Accumulated Amortization	(692.0)	(751.0)
Net Carrying Amount	1,013.0	945.0
Client relationships
Intangible asset balances by major asset class
Gross Carrying Amount	8,187.0	9,021.0
Accumulated Amortization	(2,591.0)	(2,889.0)
Net Carrying Amount	5,596.0	6,132.0
Completed technology
Intangible asset balances by major asset class
Gross Carrying Amount	5,562.0	6,074.0
Accumulated Amortization	(2,113.0)	(2,259.0)
Net Carrying Amount	3,449.0	3,815.0
Patents/trademarks
Intangible asset balances by major asset class
Gross Carrying Amount	2,117.0	2,196.0
Accumulated Amortization	(610.0)	(586.0)
Net Carrying Amount	1,507.0	1,610.0
Other**
Intangible asset balances by major asset class
Gross Carrying Amount	32.0	44.0
Accumulated Amortization	(25.0)	(35.0)
Net Carrying Amount	$ 6.0	$ 9.0