CONDENSED CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Millions	Total	Total common shareholders' equity	Common stock	Additional paid in capital	Retained earnings	Accumulated other comprehensive loss	Preferred stock of subsidiary	Noncontrolling interests
Balance at Dec. 31, 2022	$ 11,616.6	$ 11,376.9	$ 3.2	$ 4,115.2	$ 7,265.3	$ (6.8)	$ 30.4	$ 209.3
Statements of equity
Net income attributed to common shareholders	507.5	507.5	0.0	0.0	507.5	0.0	0.0	0.0
Net loss attributed to noncontrolling interests	(0.2)	0.0	0.0	0.0	0.0	0.0	0.0	(0.2)
Other comprehensive loss	(0.1)	(0.1)	0.0	0.0	0.0	(0.1)	0.0	0.0
Common stock dividends	(246.1)	(246.1)	0.0	0.0	(246.1)	0.0	0.0	0.0
Exercise of stock options	0.9	0.9	0.0	0.9	0.0	0.0	0.0	0.0
Purchase of common stock	(6.9)	(6.9)	0.0	(6.9)	0.0	0.0	0.0	0.0
Acquisition of noncontrolling interests	112.9	0.0	0.0	0.0	0.0	0.0	0.0	112.9
Distributions to noncontrolling interests	(1.3)	0.0	0.0	0.0	0.0	0.0	0.0	(1.3)
Stock-based compensation and other	4.4	4.4	0.0	4.4	0.0	0.0	0.0	0.0
Balance at Mar. 31, 2023	$ 11,987.7	11,636.6	3.2	4,113.6	7,526.7	(6.9)	30.4	320.7
Statements of equity
Common stock dividend declared (in dollars per share)	$ 0.7800
Balance at Dec. 31, 2022	$ 11,616.6	11,376.9	3.2	4,115.2	7,265.3	(6.8)	30.4	209.3
Statements of equity
Net income attributed to common shareholders	797.2
Net loss attributed to noncontrolling interests	(0.2)
Issuance of common stock	0.0
Balance at Jun. 30, 2023	12,031.4	11,681.4	3.2	4,114.7	7,570.4	(6.9)	30.4	319.6
Balance at Mar. 31, 2023	11,987.7	11,636.6	3.2	4,113.6	7,526.7	(6.9)	30.4	320.7
Statements of equity
Net income attributed to common shareholders	289.7	289.7	0.0	0.0	289.7	0.0	0.0	0.0
Net loss attributed to noncontrolling interests	0.0
Common stock dividends	(246.0)	(246.0)	0.0	0.0	(246.0)	0.0	0.0	0.0
Exercise of stock options	1.4	1.4	0.0	1.4	0.0	0.0	0.0	0.0
Purchase of common stock	(2.6)	(2.6)	0.0	(2.6)	0.0	0.0	0.0	0.0
Distributions to noncontrolling interests	(1.0)	0.0	0.0	0.0	0.0	0.0	0.0	(1.0)
Stock-based compensation and other	2.2	2.3	0.0	2.3	0.0	0.0	0.0	(0.1)
Balance at Jun. 30, 2023	$ 12,031.4	11,681.4	3.2	4,114.7	7,570.4	(6.9)	30.4	319.6
Statements of equity
Common stock dividend declared (in dollars per share)	$ 0.7800
Balance at Dec. 31, 2023	$ 12,071.5	11,724.2	3.2	4,115.9	7,612.8	(7.7)	30.4	316.9
Statements of equity
Net income attributed to common shareholders	622.3	622.3	0.0	0.0	622.3	0.0	0.0	0.0
Other comprehensive loss	(0.1)	(0.1)	0.0	0.0	0.0	(0.1)	0.0	0.0
Issuance of common stock	19.2	19.2	0.0	19.2	0.0	0.0	0.0	0.0
Common stock dividends	(263.5)	(263.5)	0.0	0.0	(263.5)	0.0	0.0	0.0
Exercise of stock options	3.7	3.7	0.0	3.7	0.0	0.0	0.0	0.0
Purchase of common stock	(2.0)	(2.0)	0.0	(2.0)	0.0	0.0	0.0	0.0
Purchase of additional ownership interest in Samson I from noncontrolling interest	(28.1)	4.3	0.0	4.3	0.0	0.0	0.0	(32.4)
Distributions to noncontrolling interests	(1.5)	0.0	0.0	0.0	0.0	0.0	0.0	(1.5)
Stock-based compensation and other	4.6	4.6	0.0	4.6	0.0	0.0	0.0	0.0
Balance at Mar. 31, 2024	$ 12,426.1	12,112.7	3.2	4,145.7	7,971.6	(7.8)	30.4	283.0
Statements of equity
Common stock dividend declared (in dollars per share)	$ 0.8350
Balance at Dec. 31, 2023	$ 12,071.5	11,724.2	3.2	4,115.9	7,612.8	(7.7)	30.4	316.9
Statements of equity
Net income attributed to common shareholders	833.6
Net loss attributed to noncontrolling interests	(1.6)
Issuance of common stock	38.2
Balance at Jun. 30, 2024	12,394.4	12,082.9	3.2	4,168.3	7,919.2	(7.8)	30.4	281.1
Balance at Mar. 31, 2024	12,426.1	12,112.7	3.2	4,145.7	7,971.6	(7.8)	30.4	283.0
Statements of equity
Net income attributed to common shareholders	211.3	211.3	0.0	0.0	211.3	0.0	0.0	0.0
Net loss attributed to noncontrolling interests	(1.6)	0.0	0.0	0.0	0.0	0.0	0.0	(1.6)
Issuance of common stock	19.0	19.0	0.0	19.0	0.0	0.0	0.0	0.0
Common stock dividends	(263.7)	(263.7)	0.0	0.0	(263.7)	0.0	0.0	0.0
Exercise of stock options	1.0	1.0	0.0	1.0	0.0	0.0	0.0	0.0
Purchase of common stock	(1.2)	(1.2)	0.0	(1.2)	0.0	0.0	0.0	0.0
Distributions to noncontrolling interests	(0.3)	0.0	0.0	0.0	0.0	0.0	0.0	(0.3)
Stock-based compensation and other	3.8	3.8	0.0	3.8	0.0	0.0	0.0	0.0
Balance at Jun. 30, 2024	$ 12,394.4	$ 12,082.9	$ 3.2	$ 4,168.3	$ 7,919.2	$ (7.8)	$ 30.4	$ 281.1
Statements of equity
Common stock dividend declared (in dollars per share)	$ 0.8350