Net Earnings per Limited Partner Common Unit (Tables)

6 Months Ended

Jun. 30, 2012

Net Earnings per Limited Partner Common Unit

Schedule of calculation for net earnings per common unit

	Three months ended June 30,						Six months ended June 30,
	2012			2011			2012			2011
	(in millions, except per-unit amounts)
Net earnings	$	154.8		$	128.9		$	279.0		$	249.8
Net earnings allocable to General Partner		(66.8	)		(54.5	)		(119.9	)		(107.7	)
Net earnings allocable to Class B Common Units		(1.5	)		(1.3	)		(2.7	)		(2.4	)
Net earnings allocable to common units	$	86.5		$	73.1		$	156.4		$	139.7
Weighted average units outstanding		18.5			18.5			18.5			18.5
Net earnings per common unit	$	4.67		$	3.95		$	8.45		$	7.55