v3.10.0.1

Segment Reporting - Financial Information by Regional Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Gross Revenue	$ 2,997.0	$ 3,051.0	$ 5,865.3	$ 5,933.3
Intercompany Revenue	(479.2)	(524.3)	(920.1)	(1,013.8)
Total revenue	2,517.8	2,526.7	4,945.2	4,919.5
Depreciation, Amortization, Depletion and Accretion	275.7	278.2	559.2	548.1
Operating Income (Loss)	408.2	425.5	812.4	813.7
Capital Expenditures	301.0	273.7	542.1	497.5
Total Assets	21,203.7	20,761.1	21,203.7	20,761.1	$ 21,147.0
Group 1 | Operating Segments
Segment Reporting Information [Line Items]
Gross Revenue	1,444.5	1,500.7	2,863.2	2,931.8
Intercompany Revenue	(251.2)	(277.2)	(490.1)	(544.3)
Total revenue	1,193.3	1,223.5	2,373.1	2,387.5
Depreciation, Amortization, Depletion and Accretion	117.8	119.9	246.9	235.3
Operating Income (Loss)	275.2	286.2	553.1	547.4
Capital Expenditures	109.6	133.4	183.6	227.7
Total Assets	10,829.9	10,616.1	10,829.9	10,616.1
Group 2 | Operating Segments
Segment Reporting Information [Line Items]
Gross Revenue	1,509.2	1,489.8	2,915.6	2,885.9
Intercompany Revenue	(224.0)	(243.4)	(422.3)	(462.7)
Total revenue	1,285.2	1,246.4	2,493.3	2,423.2
Depreciation, Amortization, Depletion and Accretion	128.4	127.9	253.3	251.9
Operating Income (Loss)	225.3	239.6	434.9	465.0
Capital Expenditures	165.3	101.2	250.2	164.0
Total Assets	8,925.4	8,590.1	8,925.4	8,590.1
Corporate entities | Corporate Entities
Segment Reporting Information [Line Items]
Gross Revenue	43.3	60.5	86.5	115.6
Intercompany Revenue	(4.0)	(3.7)	(7.7)	(6.8)
Total revenue	39.3	56.8	78.8	108.8
Depreciation, Amortization, Depletion and Accretion	29.5	30.4	59.0	60.9
Operating Income (Loss)	(92.3)	(100.3)	(175.6)	(198.7)
Capital Expenditures	26.1	39.1	108.3	105.8
Total Assets	$ 1,448.4	$ 1,554.9	$ 1,448.4	$ 1,554.9

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