Earnings Per Share (Narrative) (Details) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) shares	Dec. 31, 2021 shares	Feb. 05, 2024 $ / shares shares	Dec. 31, 2023 USD ($) $ / shares shares	Mar. 04, 2021 $ / shares
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Corporate Unit, Notional Value | $				$ 1,043
Preferred stock (without par value, 50,000,000 shares authorized; 1,043,050 issued and outstanding at December 31, 2023 and December 31, 2022) | $	$ 838			$ 838
Preferred Stock, Convertible, Initial Conversion Rate				$ 31.5428
Preferred Stock, Convertible, Conversion Price				$ 31.57
Equity Unit, Shares Issued | shares				10,430,500
Corporate Equity Unit, Stated Value Per Share				$ 100
Preferred Stock, Beneficial Ownership Interest in One Share				0.10
Preferred stock, convertible, Final Conversion Rate				$ 31.6795
Preferred Stock, Convertible, Initial Conversion Price				31.70
Shares Issued, Price Per Share				$ 25.77	$ 25.88
Forward Contract Indexed to Issuer's Equity, Settlement Rate | shares	3.864			3.8809
Subsequent Event [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares Issued, Price Per Share			$ 25.73
Forward Contract Indexed to Issuer's Equity, Settlement Rate | shares			3.8859
Share-based Payment Arrangement
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share | shares	5,000,000	5,000,000
Weighted Average Number Antidilutive Securities Excluded from Computation of EPS | shares	3,000,000	4,000,000
Equity Unit Purchase Agreements
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share | shares	40,000,000	33,000,000