Segment Reporting - Financial Information by Regional Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Gross Revenue	$ 3,101.0	$ 2,998.9	$ 6,011.5	$ 5,868.7
Intercompany Revenue	(495.7)	(481.1)	(935.6)	(923.5)
Net Revenue	2,605.3	2,517.8	5,075.9	4,945.2
Depreciation, Amortization, Depletion and Accretion	284.7	275.7	556.7	559.2
Operating Income (Loss)	437.4	408.2	860.2	812.4
Capital Expenditures	289.4	278.8	588.7	542.1
Total Assets	21,996.8	21,203.7	21,996.8	21,203.7	$ 21,617.0
Corporate entities
Segment Reporting Information [Line Items]
Gross Revenue	43.2	43.3	85.2	86.5
Intercompany Revenue	(4.6)	(4.0)	(8.2)	(7.7)
Net Revenue	38.6	39.3	77.0	78.8
Depreciation, Amortization, Depletion and Accretion	25.0	29.5	49.8	59.0
Operating Income (Loss)	(100.0)	(92.3)	(189.6)	(175.6)
Capital Expenditures	30.1	24.3	137.4	108.9
Total Assets	1,691.1	1,438.1	1,691.1	1,438.1
Group 1 | Operating Segments
Segment Reporting Information [Line Items]
Gross Revenue	1,528.6	1,446.4	2,959.6	2,866.6
Intercompany Revenue	(264.2)	(253.1)	(502.0)	(493.5)
Net Revenue	1,264.4	1,193.3	2,457.6	2,373.1
Depreciation, Amortization, Depletion and Accretion	127.0	117.8	248.5	246.9
Operating Income (Loss)	309.0	275.2	597.1	553.1
Capital Expenditures	137.1	153.0	235.6	183.5
Total Assets	11,223.2	10,851.5	11,223.2	10,851.5
Group 2 | Operating Segments
Segment Reporting Information [Line Items]
Gross Revenue	1,529.2	1,509.2	2,966.7	2,915.6
Intercompany Revenue	(226.9)	(224.0)	(425.4)	(422.3)
Net Revenue	1,302.3	1,285.2	2,541.3	2,493.3
Depreciation, Amortization, Depletion and Accretion	132.7	128.4	258.4	253.3
Operating Income (Loss)	228.4	225.3	452.7	434.9
Capital Expenditures	122.2	101.5	215.7	249.7
Total Assets	$ 9,082.5	$ 8,914.1	$ 9,082.5	$ 8,914.1