Segment Reporting - Financial Information by Regional Segment (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
Sep. 30, 2016 |
Sep. 30, 2015 |
Sep. 30, 2016 |
Sep. 30, 2015 |
Dec. 31, 2015 |
|
| Segment Reporting Information [Line Items] | |||||
| Gross Revenue | $ 2,917.6 | $ 2,833.9 | $ 8,487.1 | $ 8,244.0 | |
| Intercompany Revenue | (508.3) | (489.9) | (1,478.6) | (1,419.2) | |
| Total revenue | 2,409.3 | 2,344.0 | 7,008.5 | 6,824.8 | |
| Depreciation, Amortization, Depletion and Accretion | 272.1 | 266.8 | 805.0 | 785.5 | |
| Operating Income (Loss) | 417.9 | 442.9 | 1,145.6 | 1,204.9 | |
| Capital Expenditures | 226.7 | 232.8 | 738.7 | 732.0 | |
| Total Assets | 20,661.7 | 20,791.8 | 20,661.7 | 20,791.8 | $ 20,535.9 |
| Group 1 | Operating Segments | |||||
| Segment Reporting Information [Line Items] | |||||
| Gross Revenue | 1,347.9 | 1,295.8 | 3,907.9 | 3,764.6 | |
| Intercompany Revenue | (269.3) | (259.5) | (778.7) | (753.4) | |
| Total revenue | 1,078.6 | 1,036.3 | 3,129.2 | 3,011.2 | |
| Depreciation, Amortization, Depletion and Accretion | 105.9 | 101.2 | 313.0 | 295.6 | |
| Operating Income (Loss) | 235.1 | 220.8 | 670.2 | 642.9 | |
| Capital Expenditures | 119.3 | 125.0 | 337.8 | 318.7 | |
| Total Assets | 9,199.3 | 9,341.5 | 9,199.3 | 9,341.5 | |
| Group 2 | Operating Segments | |||||
| Segment Reporting Information [Line Items] | |||||
| Gross Revenue | 1,516.5 | 1,492.6 | 4,433.4 | 4,347.6 | |
| Intercompany Revenue | (235.5) | (227.0) | (689.8) | (655.9) | |
| Total revenue | 1,281.0 | 1,265.6 | 3,743.6 | 3,691.7 | |
| Depreciation, Amortization, Depletion and Accretion | 136.2 | 139.1 | 405.3 | 408.5 | |
| Operating Income (Loss) | 261.8 | 239.0 | 748.4 | 717.4 | |
| Capital Expenditures | 96.4 | 89.2 | 259.1 | 266.7 | |
| Total Assets | 9,908.9 | 9,929.2 | 9,908.9 | 9,929.2 | |
| Corporate Entities | Corporate Entities | |||||
| Segment Reporting Information [Line Items] | |||||
| Gross Revenue | 53.2 | 45.5 | 145.8 | 131.8 | |
| Intercompany Revenue | (3.5) | (3.4) | (10.1) | (9.9) | |
| Total revenue | 49.7 | 42.1 | 135.7 | 121.9 | |
| Depreciation, Amortization, Depletion and Accretion | 30.0 | 26.5 | 86.7 | 81.4 | |
| Operating Income (Loss) | (79.0) | (16.9) | (273.0) | (155.4) | |
| Capital Expenditures | 11.0 | 18.6 | 141.8 | 146.6 | |
| Total Assets | $ 1,553.5 | $ 1,521.1 | $ 1,553.5 | $ 1,521.1 | |