Retirement and Deferred Compensation Plans (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Statement [Abstract]
Net periodic benefit expense (recovery)	$ 1	$ 4	$ 6
Expected benefit payments in the next fiscal year	11
Defined contribution plans expense	104	97	101
Deferred compensation plans expense	18	35	22
Other Postretirement Benefit Plans [Member]
Statement [Abstract]
Benefit expense	$ (28)	$ (9)	$ 10