Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2021

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of intangible assets by class

Identifiable intangible assets consisted of the following at December 31:

(In millions)	Gross Carrying Amount		Accumulated Amortization		Net Book Value
2021
Customer relationships	$	15,103	$	5,112	$	9,991
Acquired software and technology	2,522		901		1,621
Trade names	612		228		384
Purchased software	1,133		479		654
Capitalized software and other intangibles	1,879		520		1,359
Total	$	21,249	$	7,240	$	14,009
(In millions)	Gross Carrying Amount		Accumulated Amortization		Net Book Value
2020
Customer relationships	$	15,271	$	3,668	$	11,603
Acquired software and technology	2,562		879		1,683
Trade names	618		172		446
Purchased software	913		207		706
Capitalized software and other intangibles	1,332		412		920
Total	$	20,696	$	5,338	$	15,358

Schedule of amortization expense of intangible assets

Amortization expense associated with the above identifiable intangible assets was as follows for the years ended December 31:

(In millions)	2021		2020		2019
Amortization expense	$	2,548	$	2,563	$	1,299

Schedule of estimated annual amortization expense of intangible assets

The Company estimates that annual amortization expense with respect to intangible assets recorded at December 31, 2021 will be as follows:

(In millions)
Year Ending December 31,
2022	$	2,466
2023	2,216
2024	1,780
2025	1,531
2026	1,247
Thereafter	4,769
Total	$	14,009