Noncontrolling Interests (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2021	Dec. 31, 2020
TMRC II [Member]
Noncontrolling Interest [Line Items]
Proceeds from formation of new mineral relationship	$ 214.8
Other Noncontrolling Interests		$ 369.8	$ 355.1
SFPG, LLC [Member]
Noncontrolling Interest [Line Items]
Other Noncontrolling Interests		$ 11.1	$ 11.2
Continental Resources ownership in TMRCII [Member] | TMRC II [Member]
Noncontrolling Interest [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent	50.10%
Franco-Nevada Corporation ownership in TMRCII [Member] | TMRC II [Member]
Noncontrolling Interest [Line Items]
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners	49.90%