Summary of Significant Accounting Principles and Practices (Tables)

12 Months Ended

Dec. 31, 2023

Accounting Policies [Abstract]

Schedule of Estimated Useful Lives of Assets

Depreciation and amortization are computed using the straight-line method over the estimated useful lives of the assets, which are generally as follows:

Asset Description	Estimated Useful Life
Software	Lesser of the life of an associated license, or 4 to 7 years
Leasehold improvements	Lesser of estimated useful life or lease term, not to exceed 10 years
Furniture, fixtures and equipment	4 to 10 years
Computer equipment	4 to 6 years
Buildings	35 years
Automobiles	6 years

Schedule of Other Intangible Assets by Asset Class

Amortization basis and estimated useful lives by intangible asset type are generally as follows:

Intangible Asset Description	Amortization Basis	Estimated Useful Life
Customer-related and contract-based	In line with underlying cash flows	7 to 20 years
Technology and other intangibles	Straight-line	5 to 7 years
Tradenames	Straight-line	1 to 3 years

Other intangible assets by asset class are as follows (in millions):

	2023						2022
As of December 31	Gross Carrying Amount		Accumulated Amortization and Impairment		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization and Impairment		Net Carrying Amount
Customer-related and contract-based (1)	$	1,873	$	1,686	$	187	$	2,207	$	1,833	$	374
Technology and other intangibles	371		324		47		450		377		73
Total	$	2,244	$	2,010	$	234	$	2,657	$	2,210	$	447

(1)As of December 31, 2023, the Company classified $158 million of Intangible assets, net, as Assets held for sale within Other current assets. Refer to Note 6 “Acquisitions and Dispositions of Businesses” for further information.