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Stock Options, Restricted Stock, and Dividend Reinvestment Plans - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (in shares)	4,558,402
Number of outstanding awards with stock price performance conditions (in shares)	1
Award vesting period	3 years
Percent of performance condition achieved	100.00%
Value of annual equity awards to non employee directors	$ 122,000	$ 122,000
Total intrinsic value of options exercised	$ 4,000,000	17,000,000	$ 12,000,000
Stock options granted or converted (in shares)	0		155,124
Grants in period, weighted average grant date fair value (in dollars per share)			$ 3.39
Stock-based compensation expense	$ 36,000,000	75,000,000	$ 43,000,000
Total income tax benefits recognized	$ 8,000,000	18,000,000	10,000,000
Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted (in shares)	0
Nonvested Restricted Stock Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized	$ 78,000,000
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition	2 years
Total grant date fair value of shares vested	$ 32,000,000	$ 29,000,000	$ 36,000,000
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	7 years
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition	2 months 12 days
Employee Stock Option \| Tranche 1
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period	7 years
Employee Stock Option \| Tranche 2
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period	10 years
Employee Stock Option \| Tranche 3
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period	10 years
Employee Stock Option \| Tranche 4
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period	20 years
Phantom Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period	5 years
Shares outstanding (in shares)	199,114
Equity Compensation Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares available for new awards (in shares)	4,965,419
Performance Condition Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Duration of performance evaluation	3 years	3 years	3 years
Performance Condition Awards \| PSUs Granted Between 2014 And 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Post vest holding period	2 years	2 years
Percent of performance condition achieved	187.50%	187.50%	133.30%
Market Condition Award \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period				7 years
Dividend Reinvestment Plan \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Quarterly value of shares available for purchase under dividend reinvestment and stock purchase plan	$ 25
Dividend Reinvestment Plan \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Quarterly value of shares available for purchase under dividend reinvestment and stock purchase plan	$ 10,000