Description of Business and Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2022

Accounting Policies [Abstract]

Schedule of Cash, Cash Equivalents and Restricted Cash

Cash, cash equivalents and restricted cash are included in the following line items in the consolidated balance sheets:

	(dollars in millions)
At December 31,	2022		2021		Increase / (Decrease)
Cash and cash equivalents	$	2,605	$	2,921	$	(316)
Restricted cash:
Prepaid expenses and other	1,343		1,094		249
Other assets	163		146		17
Cash, cash equivalents and restricted cash	$	4,111	$	4,161	$	(50)

Schedule of Restricted Cash

Cash, cash equivalents and restricted cash are included in the following line items in the consolidated balance sheets:

	(dollars in millions)
At December 31,	2022		2021		Increase / (Decrease)
Cash and cash equivalents	$	2,605	$	2,921	$	(316)
Restricted cash:
Prepaid expenses and other	1,343		1,094		249
Other assets	163		146		17
Cash, cash equivalents and restricted cash	$	4,111	$	4,161	$	(50)

Schedule of Cumulative Effect for Adoption of New Accounting Pronouncement

The cumulative after-tax effect of the changes made to our consolidated financial statements for the adoption of Topic 326 was as follows:

(dollars in millions)	At December 31, 2019		Adjustments due to Topic 326		At January 1, 2020
Retained earnings	$	53,147	$	(200)	$	52,947