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
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	1,113.2
Net loss attributed to noncontrolling interests	(0.9)
Issuance of common stock	0.0
Balance at Sep. 30, 2023	12,100.3	11,753.0	3.2	4,116.4	7,640.4	(7.0)	30.4	316.9
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
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
Net income attributed to common shareholders	316.0	316.0	0.0	0.0	316.0	0.0	0.0	0.0
Net loss attributed to noncontrolling interests	(0.7)	0.0	0.0	0.0	0.0	0.0	0.0	(0.7)
Other comprehensive loss	(0.1)	(0.1)	0.0	0.0	0.0	(0.1)	0.0	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	0.7	0.7	0.0	0.7	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	(2.0)	0.0	0.0	0.0	0.0	0.0	0.0	(2.0)
Stock-based compensation and other	2.2	2.2	0.0	2.2	0.0	0.0	0.0	0.0
Balance at Sep. 30, 2023	12,100.3	11,753.0	3.2	4,116.4	7,640.4	(7.0)	30.4	316.9
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
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	1,073.7
Net loss attributed to noncontrolling interests	(3.4)
Issuance of common stock	51.0
Balance at Sep. 30, 2024	12,391.2	12,082.0	3.2	4,191.4	7,895.3	(7.9)	30.4	278.8
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
Net income attributed to common shareholders	240.1	240.1	0.0	0.0	240.1	0.0	0.0	0.0
Net loss attributed to noncontrolling interests	(1.8)	0.0	0.0	0.0	0.0	0.0	0.0	(1.8)
Other comprehensive loss	(0.1)	(0.1)	0.0	0.0	0.0	(0.1)	0.0	0.0
Issuance of common stock	12.8	12.8	0.0	12.8	0.0	0.0	0.0	0.0
Common stock dividends	(264.0)	(264.0)	0.0	0.0	(264.0)	0.0	0.0	0.0
Exercise of stock options	8.7	8.7	0.0	8.7	0.0	0.0	0.0	0.0
Distributions to noncontrolling interests	(0.5)	0.0	0.0	0.0	0.0	0.0	0.0	(0.5)
Stock-based compensation and other	1.6	1.6	0.0	1.6	0.0	0.0	0.0	0.0
Balance at Sep. 30, 2024	$ 12,391.2	$ 12,082.0	$ 3.2	$ 4,191.4	$ 7,895.3	$ (7.9)	$ 30.4	$ 278.8