Conveyance of Future Hard Minerals Royalty Revenues (Tables)

9 Months Ended

Sep. 30, 2016

Deferred Revenue Disclosure [Abstract]

Schedule of Future Royalty Payments

The following summarizes the remaining amounts that the Company expects to pay, prior to the potential 3% to 4% of any excess described above:

millions
2017	$	50
2018	50
2019	52
2020	56
2021	57
Later years	263
Total	$	528