Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Commitments and Contingencies [Abstract]

Summary of Contractual Obligations

The following table summarizes our various contractual obligations at December 31, 2017.  A description of each type of contractual obligation follows:

	Payment or Settlement due by Period
Contractual Obligations	Total		2018		2019		2020		2021		2022		Thereafter
Scheduled maturities of debt obligations	$	24,780.1	$	2,855.7	$	1,500.0	$	1,500.0	$	575.0	$	650.0	$	17,699.4
Estimated cash interest payments	$	23,942.0	$	1,082.9	$	1,022.1	$	964.2	$	912.1	$	884.7	$	19,076.0
Operating lease obligations	$	413.3	$	57.0	$	52.8	$	47.2	$	40.0	$	31.3	$	185.0
Purchase obligations:
Product purchase commitments:
Estimated payment obligations:
Natural gas	$	1,911.5	$	615.1	$	528.6	$	434.9	$	332.9	$	--	$	--
NGLs	$	99.0	$	69.6	$	29.4	$	--	$	--	$	--	$	--
Crude oil	$	7,891.3	$	1,352.3	$	1,341.0	$	945.8	$	728.4	$	728.4	$	2,795.4
Petrochemicals & refined products	$	632.1	$	411.9	$	214.1	$	6.1	$	--	$	--	$	--
Other	$	33.3	$	9.3	$	9.3	$	7.6	$	3.5	$	1.4	$	2.2
Underlying major volume commitments:
Natural gas (in TBtus)		812		265		225		182		140		--		--
NGLs (in MMBbls)		7		5		2		--		--		--		--
Crude oil (in MMBbls)		471		38		55		51		47		47		233
Petrochemicals & refined products (in MMBbls)		11		7		4		--		--		--		--
Service payment commitments	$	398.0	$	98.3	$	84.5	$	60.0	$	44.8	$	43.1	$	67.3
Capital expenditure commitments	$	171.6	$	171.6	$	--	$	--	$	--	$	--	$	--

Schedule of Other Liabilities

The following table summarizes the components of “Other long-term liabilities” as presented on our Consolidated Balance Sheets at the dates indicated:

	December 31,
	2017		2016
Noncurrent portion of AROs (see Note 5)	$	81.1	$	76.5
Deferred revenues – non-current portion (see Note 3)		135.5		137.0
Liquidity Option Agreement		333.9		269.6
Derivative liabilities		10.4		2.8
Centennial guarantees		4.5		5.3
Other		13.0		12.7
Total	$	578.4	$	503.9