Condensed Consolidated Balance Sheets (Unaudited) (Parentheticals) - USD ($) $ / shares in Thousands, $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Accounts receivable, allowance for credit losses	$ 14	$ 15
Series A Perpetual Preferred Stock, par value (in dollars per share)	$ 0	$ 0
Series A Perpetual Preferred Stock, shares authorized (in shares)	1,500,000	1,500,000
Series A Perpetual Preferred Stock, shares issued (in shares)	650,000	650,000
Series A Perpetual Preferred Stock, shares outstanding (in shares)	650,000	650,000
Series A Perpetual Preferred Stock, liquidation value	$ 650	$ 650
Common stock, shares authorized (in shares)	200,000,000
Common Stock (No Par Value) [Member]
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares issued (in shares)	113,435,295	111,166,022
Common stock, shares outstanding (in shares)	92,287,559	90,768,247
Treasury stock, shares (in shares)	21,147,736	20,397,775
Class A Common Stock (No Par Value) [Member]
Common stock, par value (in dollars per share)	$ 0	$ 0
Common stock, shares authorized (in shares)	25,000,000	25,000,000
Common stock, shares issued (in shares)	12,198,808	11,237,386
Common stock, shares outstanding (in shares)	9,586,408	8,814,187
Treasury stock, shares (in shares)	2,612,400	2,423,199