Equity Equity, Earnings Per Unit (Details) $ / shares in Units, shares in Millions, $ in Millions |
9 Months Ended | 12 Months Ended | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
Sep. 30, 2017
USD ($)
$ / shares
shares
|
Sep. 30, 2016
USD ($)
$ / shares
shares
|
Dec. 31, 2016
USD ($)
|
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| Net earnings | [1] | $ 314.0 | [2] | $ 242.0 | |||||||||||||
| Special allocations of net earnings (“Special Allocations”) (a) | [3] | (1.0) | (2.0) | ||||||||||||||
| Net earnings, including Special Allocations | 315.0 | 244.0 | |||||||||||||||
| Distributions greater than earnings | $ 173.0 | $ 118.0 | |||||||||||||||
| Common units - basic | shares | [1] | 107.0 | 96.7 | ||||||||||||||
| Common units - diluted | shares | [1] | 107.1 | 96.8 | ||||||||||||||
| Common - basic | $ / shares | [1] | $ 2.05 | $ 1.58 | ||||||||||||||
| Common - diluted | $ / shares | [1] | $ 2.05 | $ 1.58 | ||||||||||||||
| 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 | [1] | 15.0 | $ (21.0) | ||||||||||||||
| Common | |||||||||||||||||
| Special allocations of net earnings (“Special Allocations”) (a) | [3] | (1.0) | (2.0) | ||||||||||||||
| Limited partners’ distributions on common units | [4] | (407.0) | (250.0) | ||||||||||||||
| Distributions greater than earnings | 186.0 | 95.0 | |||||||||||||||
| Participating Securities, Distributed and Undistributed Earnings (Loss), Basic | 220.0 | 153.0 | |||||||||||||||
| Net Income (Loss) Attributable To Predecessors | 0.0 | ||||||||||||||||
| General Partner | |||||||||||||||||
| General partner’s distributions | (6.0) | (7.0) | |||||||||||||||
| General partner’s IDRs (b) | [5] | (75.0) | (105.0) | ||||||||||||||
| Distributions greater than earnings | [6] | 13.0 | (23.0) | ||||||||||||||
| Participating Securities, Distributed and Undistributed Earnings (Loss), Basic | 94.0 | $ 89.0 | |||||||||||||||
| Net Income (Loss) Attributable To Predecessors | $ 0.0 | ||||||||||||||||
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