| Pension and SERP | Pension and SERP | |||||||||||
| For the Three Months Ended | For the Nine Months Ended | |||||||||||
| September 30, 2013 | September 30, 2012 | September 30, 2013 | September 30, 2012 | |||||||||
| (Millions of Dollars) | NU | NU | NU | NU | ||||||||
| Service Cost | $ | 25.6 | $ | 23.0 | $ | 76.7 | $ | 61.1 | ||||
| Interest Cost | 51.7 | 53.3 | 155.0 | 144.7 | ||||||||
| Expected Return on Plan Assets | (69.5) | (59.5) | (208.5) | (161.3) | ||||||||
| Actuarial Loss | 52.4 | 47.4 | 158.1 | 125.0 | ||||||||
| Prior Service Cost | 1.1 | 2.0 | 3.0 | 6.1 | ||||||||
| Total Net Periodic Benefit Expense | $ | 61.3 | $ | 66.2 | $ | 184.3 | $ | 175.6 | ||||
| Capitalized Pension Expense | $ | 18.3 | $ | 19.2 | $ | 54.9 | $ | 49.5 | ||||
| PBOP | PBOP | |||||||||||
| For the Three Months Ended | For the Nine Months Ended | |||||||||||
| September 30, 2013 | September 30, 2012 | September 30, 2013 | September 30, 2012 | |||||||||
| (Millions of Dollars) | NU | NU | NU | NU | ||||||||
| Service Cost | $ | 4.2 | $ | 4.4 | $ | 12.6 | $ | 11.3 | ||||
| Interest Cost | 11.8 | 14.3 | 35.4 | 34.4 | ||||||||
| Expected Return on Plan Assets | (13.9) | (11.1) | (41.6) | (28.1) | ||||||||
| Actuarial Loss | 6.5 | 10.3 | 19.5 | 25.5 | ||||||||
| Prior Service Credit | (0.5) | (0.5) | (1.5) | (0.9) | ||||||||
| Net Transition Obligation Cost | - | 3.1 | - | 9.0 | ||||||||
| Total Net Periodic Benefit Expense | $ | 8.1 | $ | 20.5 | $ | 24.4 | $ | 51.2 | ||||
| Capitalized PBOP Expense | $ | 2.6 | $ | 5.1 | $ | 7.6 | $ | 14.9 | ||||
| Pension and SERP | ||||||||||||||||||||||||
| For the Three Months Ended September 30, 2013 | For the Three Months Ended September 30, 2012 | |||||||||||||||||||||||
| NSTAR | NSTAR | |||||||||||||||||||||||
| (Millions of Dollars) | CL&P | Electric(1) | PSNH | WMECO | CL&P | Electric(1) | PSNH | WMECO | ||||||||||||||||
| Service Cost | $ | 6.3 | $ | 8.3 | $ | 3.3 | $ | 1.2 | $ | 5.4 | $ | 7.6 | $ | 2.9 | $ | 1.0 | ||||||||
| Interest Cost | 12.1 | 14.5 | 5.8 | 2.5 | 12.9 | 14.7 | 6.1 | 2.6 | ||||||||||||||||
| Expected Return on Plan Assets | (18.4) | (21.1) | (9.2) | (4.3) | (17.7) | (16.4) | (7.2) | (4.1) | ||||||||||||||||
| Actuarial Loss | 13.9 | 14.4 | 5.4 | 2.9 | 12.6 | 15.7 | 4.2 | 2.7 | ||||||||||||||||
| Prior Service Cost/(Credit) | 0.4 | - | 0.1 | 0.1 | 0.9 | (0.1) | 0.4 | 0.2 | ||||||||||||||||
| Total Net Periodic Benefit Expense | $ | 14.3 | $ | 16.1 | $ | 5.4 | $ | 2.4 | $ | 14.1 | $ | 21.5 | $ | 6.4 | $ | 2.4 | ||||||||
| Intercompany Allocations | $ | 11.4 | $ | (2.1) | $ | 2.6 | $ | 2.0 | $ | 10.7 | $ | (3.0) | $ | 2.4 | $ | 2.1 | ||||||||
| Capitalized Pension Expense | $ | 7.0 | $ | 9.8 | $ | 1.7 | $ | 1.3 | $ | 6.8 | $ | 8.4 | $ | 1.9 | $ | 1.3 | ||||||||
| Pension and SERP | ||||||||||||||||||||||||
| For the Nine Months Ended September 30, 2013 | For the Nine Months Ended September 30, 2012 | |||||||||||||||||||||||
| NSTAR | NSTAR | |||||||||||||||||||||||
| (Millions of Dollars) | CL&P | Electric(1) | PSNH | WMECO | CL&P | Electric(1) | PSNH | WMECO | ||||||||||||||||
| Service Cost | $ | 18.7 | $ | 24.8 | $ | 9.8 | $ | 3.5 | $ | 16.3 | $ | 22.7 | $ | 8.8 | $ | 3.1 | ||||||||
| Interest Cost | 36.3 | 43.5 | 17.8 | 7.5 | 38.5 | 44.2 | 18.3 | 7.9 | ||||||||||||||||
| Expected Return on Plan Assets | (55.4) | (63.3) | (26.2) | (13.0) | (52.8) | (49.2) | (21.1) | (12.3) | ||||||||||||||||
| Actuarial Loss | 42.0 | 43.6 | 16.2 | 8.9 | 37.0 | 47.3 | 12.1 | 8.0 | ||||||||||||||||
| Prior Service Cost/(Credit) | 1.4 | (0.2) | 0.4 | 0.3 | 2.7 | (0.4) | 1.1 | 0.6 | ||||||||||||||||
| Total Net Periodic Benefit Expense | $ | 43.0 | $ | 48.4 | $ | 18.0 | $ | 7.2 | $ | 41.7 | $ | 64.6 | $ | 19.2 | $ | 7.3 | ||||||||
| Intercompany Allocations | $ | 33.6 | $ | (6.2) | $ | 7.8 | $ | 6.0 | $ | 32.0 | $ | (9.2) | $ | 7.5 | $ | 6.0 | ||||||||
| Capitalized Pension Expense | $ | 21.0 | $ | 21.6 | $ | 5.6 | $ | 3.9 | $ | 20.2 | $ | 23.6 | $ | 5.8 | $ | 3.7 | ||||||||
| PBOP | ||||||||||||||||||
| For the Three Months Ended September 30, 2013 | For the Three Months Ended September 30, 2012 | |||||||||||||||||
| (Millions of Dollars) | CL&P | PSNH | WMECO | CL&P | PSNH | WMECO | ||||||||||||
| Service Cost | $ | 0.9 | $ | 0.6 | $ | 0.2 | $ | 0.8 | $ | 0.5 | $ | 0.1 | ||||||
| Interest Cost | 2.0 | 1.0 | 0.4 | 2.3 | 1.1 | 0.5 | ||||||||||||
| Expected Return on Plan Assets | (2.5) | (1.3) | (0.6) | (2.3) | (1.1) | (0.5) | ||||||||||||
| Actuarial Loss | 1.8 | 0.9 | 0.3 | 1.9 | 0.9 | 0.3 | ||||||||||||
| Net Transition Obligation Cost | - | - | - | 1.5 | 0.6 | 0.3 | ||||||||||||
| Total Net Periodic Benefit Expense | $ | 2.2 | $ | 1.2 | $ | 0.3 | $ | 4.2 | $ | 2.0 | $ | 0.7 | ||||||
| Intercompany Allocations | $ | 1.7 | $ | 0.4 | $ | 0.3 | $ | 2.0 | $ | 0.5 | $ | 0.4 | ||||||
| Capitalized PBOP Expense | $ | 1.3 | $ | 0.4 | $ | 0.3 | $ | 2.1 | $ | 0.6 | $ | 0.4 | ||||||
| PBOP | ||||||||||||||||||
| For the Nine Months Ended September 30, 2013 | For the Nine Months Ended September 30, 2012 | |||||||||||||||||
| (Millions of Dollars) | CL&P | PSNH | WMECO | CL&P | PSNH | WMECO | ||||||||||||
| Service Cost | $ | 2.6 | $ | 1.7 | $ | 0.5 | $ | 2.2 | $ | 1.5 | $ | 0.4 | ||||||
| Interest Cost | 5.9 | 3.1 | 1.3 | 6.9 | 3.4 | 1.5 | ||||||||||||
| Expected Return on Plan Assets | (7.6) | (3.9) | (1.7) | (6.8) | (3.4) | (1.6) | ||||||||||||
| Actuarial Loss | 5.6 | 2.7 | 0.8 | 5.7 | 2.7 | 0.9 | ||||||||||||
| Net Transition Obligation Cost | - | - | - | 4.6 | 1.9 | 1.1 | ||||||||||||
| Total Net Periodic Benefit Expense | $ | 6.5 | $ | 3.6 | $ | 0.9 | $ | 12.6 | $ | 6.1 | $ | 2.3 | ||||||
| Intercompany Allocations | $ | 5.3 | $ | 1.2 | $ | 1.0 | $ | 5.9 | $ | 1.5 | $ | 1.1 | ||||||
| Capitalized PBOP Expense | $ | 3.7 | $ | 1.1 | $ | 0.7 | $ | 6.2 | $ | 1.7 | $ | 1.1 | ||||||