Capital Stock - Dividends Common Stock (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended												12 Months Ended
	Oct. 31, 2021	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Equity [Abstract]
Base (in dollars per share)		$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.15	$ 0.15	$ 0.15	$ 0.15	$ 0.13	$ 0.11	$ 0.11	$ 0.10	$ 0.80	$ 0.60	$ 0.45
Variable (in dollars per share)		0	0	0	0.37	0.53	0.50	0.45	0.41	0.67	0	0	0	0.37	1.89	0.67
Total (in dollars per share)	$ 0.50	$ 0.20	$ 0.20	$ 0.20	$ 0.57	$ 0.68	$ 0.65	$ 0.60	$ 0.56	$ 0.80	$ 0.11	$ 0.11	$ 0.10	$ 1.17	$ 2.49	$ 1.12
Total Dividends Paid (In millions)		$ 151	$ 153	$ 153	$ 438	$ 533	$ 519	$ 484	$ 455	$ 651	$ 44	$ 44	$ 40	$ 895	$ 1,991	$ 779