Organization and Basis of Presentation (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		0 Months Ended										3 Months Ended
	Jun. 30, 2013	Jun. 30, 2013 Carlyle/Riverstone Funds	Apr. 02, 2013 Previous structure Carlyle/Riverstone Funds	Apr. 02, 2013 Previous structure Subordinated Units	Apr. 02, 2013 Previous structure Subordinated Units Minimum Quarterly Distribution	Apr. 02, 2013 Previous structure Subordinated Units Carlyle/Riverstone Funds	Apr. 02, 2013 Unitholders Minimum Previous structure	Apr. 02, 2013 Unitholders Maximum Previous structure	Apr. 02, 2013 Common unitholders New structure Minimum Quarterly Distribution	Apr. 02, 2013 IDR Holder New structure Carlyle/Riverstone Funds	Apr. 02, 2013 IDR Holder Minimum Previous structure Carlyle/Riverstone Funds	Apr. 02, 2013 IDR Holder Maximum Previous structure Carlyle/Riverstone Funds	Jun. 30, 2013 Public owners
Members' equity
Subordinated units outstanding						33,800,000
Notional Subordinated Units (in shares)						33,800,000
Additional distributions per quarter prior to increasing the quarterly distribution on Niska Partners' common units				$ 12
Total Quarterly Distribution per Unit Target Amount (in dollars per unit)					$ 0.35		$ 0.4025	$ 0.5250	$ 0.35
Marginal Percentage Interest in Cash Distributions										48.00%	13.00%	48.00%
Period for which Carlyle Riverstone Funds will be deemed to own Notional Subordinated Units			5 years
Common units outstanding	34,492,245	16,992,245											17,500,000
Managing member's interest (as a percent)	1.98%	1.98%
Ownership interest (as a percent)		50.27%											49.73%