The following table summarizes our various contractual obligations at December 31, 2011. A description of each type of contractual obligation follows:

	Payment or Settlement due by Period
Contractual Obligations	Total		2012		2013		2014		2015		2016		Thereafter
Scheduled maturities of debt obligations	$	14,482.7	$	500.0	$	1,200.0	$	1,150.0	$	650.0	$	900.0	$	10,082.7
Estimated cash interest payments	$	16,109.5	$	819.6	$	759.1	$	688.3	$	642.4	$	623.1	$	12,577.0
Operating lease obligations	$	386.4	$	58.3	$	47.4	$	39.7	$	38.2	$	32.3	$	170.5
Purchase obligations:
Product purchase commitments:
Estimated payment obligations:
Natural gas	$	4,974.8	$	909.4	$	807.8	$	739.6	$	679.7	$	631.5	$	1,206.8
NGLs	$	6,048.0	$	2,806.4	$	1,578.1	$	833.1	$	457.6	$	372.8	$	--
Crude oil	$	1,770.3	$	1,770.3	$	--	$	--	$	--	$	--	$	--
Petrochemicals & refined products	$	2,027.8	$	1,309.5	$	382.1	$	113.5	$	111.2	$	111.5	$	--
Other	$	49.7	$	7.6	$	7.5	$	6.9	$	6.6	$	6.3	$	14.8
Underlying major volume commitments:
Natural gas (in BBtus) (1)		1,738,568		321,030		287,384		260,051		237,251		219,600		413,252
NGLs (in MBbls) (2)		88,207		42,503		23,458		12,122		5,773		4,351		--
Crude oil (in MBbls) (2)		18,015		18,015		--		--		--		--		--
Petrochemicals & refined products (in MBbls) (2)		28,074		17,962		5,257		1,639		1,606		1,610		--
Service payment commitments	$	627.3	$	100.3	$	96.9	$	74.8	$	64.8	$	82.5	$	208.0
Capital expenditure commitments	$	1,312.5	$	1,312.5	$	--	$	--	$	--	$	--	$	--
(1) Volume is measured in billion British thermal units (“BBtus”). (2) Volume is measured in thousands of barrels (“MBbls”).