Pension and Other Benefit Programs - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Contributions	$ 0	$ 0	$ 0
Amount pending settlement	$ 3,000,000	24,000,000
Period of amortization	4 years
Corridor approach percentage	10.00%
Cash surrender value of life insurance	$ 61,000,000	60,000,000
Net periodic post-retirement benefit costs	$ 1,000,000	$ 2,000,000	0
Discount rate	2.60%	2.10%
Weighted-average discount rate for determining interest costs (pension/SERP plans)	1.60%	2.60%
Health care cost trend rate assumed	5.70%
Ultimate health care cost trend rate	4.50%
Contribution plan cost	$ 63,000,000	$ 52,000,000	42,000,000
Supplemental Employee Retirement Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic post-retirement benefit costs	1,000,000	1,000,000	1,000,000
Post-retirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic post-retirement benefit costs	2,000,000	$ 2,000,000	$ 2,000,000
Anticipated medicare subsidy receipts	$ 9,000,000
Equity securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Target allocation, percentage	5.00%
Fixed income securities
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Target allocation, percentage	95.00%