U.S. Pension Benefits | Non-U.S. Pension Benefits | ||||||||||||||
2013 | 2012 | 2013 | 2012 | ||||||||||||
Service cost | $ | 5.5 | $ | 5.6 | $ | 27.4 | $ | 23.9 | |||||||
Interest cost | 97.4 | 101.8 | 41.1 | 42.5 | |||||||||||
Expected return on plan assets | (125.1 | ) | (129.9 | ) | (34.3 | ) | (32.8 | ) | |||||||
Amortization of prior service credit | — | — | (0.2 | ) | (0.2 | ) | |||||||||
Amortization of net loss | 31.4 | 44.3 | 7.5 | 4.7 | |||||||||||
Curtailment and settlement losses (gains) recognized | — | 0.3 | (1.2 | ) | 1.5 | ||||||||||
Net periodic pension cost | $ | 9.2 | $ | 22.1 | $ | 40.3 | $ | 39.6 | |||||||