CONSOLIDATED STATEMENTS OF PARTNERS' CAPITAL (USD $) In Millions, unless otherwise specified	Total	General Partner's Interests	Common Units	Class B Common Units
Partners' capital at Dec. 31, 2012	$ 271.8	$ 32.3	$ 238.3	$ 1.2
Increase (Decrease) in Partners' Capital
Net earnings	316.1	136.8	176.2	3.1
Distributions	(274.6)	(118.0)	(153.9)	(2.7)
Partners' capital at Jun. 30, 2013	313.3	51.1	260.6	1.6
Partners' capital at Dec. 31, 2013	309.0	43.0	264.5	1.5
Increase (Decrease) in Partners' Capital
Net earnings	203.0	82.2	118.8	2.0
Distributions	(156.1)	(60.0)	(94.6)	(1.5)
Partners' capital at Jun. 30, 2014	$ 355.9	$ 65.2	$ 288.7	$ 2.0