Stock Compensation Plans and Other Compensation Arrangements (Tables)

12 Months Ended

Dec. 31, 2023

Share-Based Payment Arrangement [Abstract]

Stock Award Rollforward Activity

Stock award activity for the years ended December 31, 2021, 2022 and 2023, is presented in the table below. Vested awards do not include any adjustments to reflect the final performance measure for issued shares.

	Stock Awards (in thousands)	Weighted- Average Grant Date Fair Value Per Share		Weighted- Average Remaining Contractual Term (in years)
Outstanding at January 1, 2021	603	$	311	1.4
Granted	304	296
Vested	(269)	286
Forfeited	(58)	318
Outstanding at December 31, 2021	580	$	314	1.4
Granted	238	397
Vested	(226)	327
Forfeited	(31)	320
Outstanding at December 31, 2022	561	$	344	1.4
Granted	216	478
Vested	(249)	315
Forfeited	(29)	373
Outstanding at December 31, 2023	499	$	417	1.3

Cash Units and Cash Performance Units Aggregate Payout Amount [Table Text Block]

The following table presents the minimum and maximum aggregate payout amounts related to those cash awards granted for the periods presented:

	Year Ended December 31
$ in millions	2023		2022		2021
Minimum aggregate payout amount	$	34	$	32	$	31
Maximum aggregate payout amount	192		183		178