Net Earnings per Common Unit (Tables)

12 Months Ended

Dec. 31, 2015

Earnings Per Unit [Abstract]

Schedule of calculation for net earnings per common unit

The following table provides a calculation for net earnings per common unit for the years ended December 31, 2015, 2014 and 2013:

	Year Ended December 31,
	2015		2014		2013
	(in millions, except per unit amounts)
Basic earnings per Common Unit:
Net earnings	$	306.9	$	370.0	$	502.4
Less: Net earnings allocable to General Partner	117.7		143.1		205.7
Less: Net earnings allocable to Class B Common Units	3.0		3.6		4.9
Net earnings allocable to Common Units	$	186.2	$	223.3	$	291.8
Weighted-average Common Units outstanding	18.5		18.5		18.5
Net earnings per Common Unit	$	10.06	$	12.07	$	15.77