|
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $)
In Millions, unless otherwise specified |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
|
Mar. 31, 2015
|
Mar. 31, 2014
|
Mar. 31, 2015
|
Mar. 31, 2014
|
|
| Net income | $ 84.6 | $ 85.1 | $ 226.0 | $ 173.4 |
| Other comprehensive income (loss): | ||||
| Pension and other postretirement benefits | 6.0 | 4.3 | (95.2) | 165.3 |
| Interest rate cash flow hedge amortization | 0.2 | 0.2 | 0.5 | 0.5 |
| Change in fair value of long-term investment | 0 | 0 | 0 | (0.1) |
| Income taxes | (2.4) | (1.8) | 36.3 | (63.5) |
| Net other comprehensive income (loss) | 3.8 | 2.7 | (58.4) | 102.2 |
| COMPREHENSIVE INCOME | 88.4 | 87.8 | 167.6 | 275.6 |
| Questar Pipeline [Member] | ||||
| Net income | 13.9 | 15.7 | 58.8 | 8.1 |
| Other comprehensive income (loss): | ||||
| Interest rate cash flow hedge amortization | 0.2 | 0.2 | 0.5 | 0.5 |
| Income taxes | (0.1) | (0.1) | (0.1) | (0.2) |
| Net other comprehensive income (loss) | 0.1 | 0.1 | 0.4 | 0.3 |
| COMPREHENSIVE INCOME | $ 14.0 | $ 15.8 | $ 59.2 | $ 8.4 |