Subsequent Events (Tables)

12 Months Ended

Dec. 31, 2020

Subsequent Events [Abstract]

Schedule of Dividends Payable [Table Text Block]

The General Partner's board of directors declared the following dividends/distributions at its regularly scheduled board meeting held on January 27, 2021:

Class of stock/units	Quarterly Amount per Share or Unit		Record Date	Payment Date
Common	$	0.255	February 16, 2021	February 26, 2021