Equity Equity, Earnings Per Unit (Details) $ / shares in Units, shares in Millions, $ in Millions |
3 Months Ended | 9 Months Ended | 12 Months Ended | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Sep. 30, 2017
USD ($)
$ / shares
shares
|
Sep. 30, 2016
USD ($)
$ / shares
shares
|
Sep. 30, 2017
USD ($)
$ / shares
shares
|
Sep. 30, 2016
USD ($)
$ / shares
shares
|
Dec. 31, 2016
USD ($)
|
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| Net earnings | $ 97.0 | $ 81.0 | [1] | $ 299.0 | $ 242.0 | [1] | ||||||||||||||
| Special allocations of net earnings (“Special Allocations”) (a) | [2] | 0.0 | (2.0) | (1.0) | (2.0) | |||||||||||||||
| Net earnings, including Special Allocations | 97.0 | 83.0 | 300.0 | 244.0 | ||||||||||||||||
| Distributions greater than earnings | $ (104.0) | $ (48.0) | $ 188.0 | $ 118.0 | ||||||||||||||||
| Common units - basic | shares | 108.0 | 101.4 | [1] | 107.0 | 96.7 | [1] | ||||||||||||||
| Common units - diluted | shares | [3] | 108.1 | 101.4 | [1] | 107.1 | 96.8 | [1] | |||||||||||||
| Common - basic | $ / shares | $ 0.90 | $ 0.46 | [1] | $ 2.05 | $ 1.58 | [1] | ||||||||||||||
| Common - diluted | $ / shares | $ 0.90 | $ 0.46 | [1] | $ 2.05 | $ 1.58 | [1] | ||||||||||||||
| Incentive Distribution, Distribution Split Marginal Percentage | 50.00% | |||||||||||||||||||
| Incentive Distribution, Minimum Distribution Level | $ / shares | 0.3881 | |||||||||||||||||||
| Incentive Distribution, Distribution | $ 38.0 | $ 12.5 | ||||||||||||||||||
| Net Income (Loss) Attributable To Predecessors | $ 0.0 | $ (7.0) | [1] | 0.0 | $ (21.0) | [1] | ||||||||||||||
| Common | ||||||||||||||||||||
| Special allocations of net earnings (“Special Allocations”) (a) | [2] | 0.0 | (2.0) | (1.0) | (2.0) | |||||||||||||||
| Limited partners’ distributions on common units | [4] | (201.0) | (89.0) | (407.0) | (250.0) | |||||||||||||||
| Distributions greater than earnings | 104.0 | 40.0 | 186.0 | 95.0 | ||||||||||||||||
| Participating Securities, Distributed and Undistributed Earnings (Loss), Basic | 97.0 | 47.0 | 220.0 | 153.0 | ||||||||||||||||
| General Partner | ||||||||||||||||||||
| General partner’s distributions | 0.0 | (3.0) | (6.0) | (7.0) | ||||||||||||||||
| General partner’s IDRs (b) | [5] | 0.0 | (39.0) | (75.0) | (105.0) | |||||||||||||||
| Distributions greater than earnings | [6] | 0.0 | (8.0) | (2.0) | (23.0) | |||||||||||||||
| Participating Securities, Distributed and Undistributed Earnings (Loss), Basic | $ 0.0 | $ 34.0 | $ 79.0 | $ 89.0 | ||||||||||||||||
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