Balance at December 31, 2013 | Quoted Price in Active Markets for Identical Assets (Level 1) | Significant Other Observable Inputs (Level 2) | Significant Unobservable Inputs (Level 3) | |||||||||||||
Assets: | ||||||||||||||||
Available-for-sale securities | $ | 2,452.6 | $ | 433.1 | $ | 2,019.5 | $ | — | ||||||||
Cash equivalents | 20.0 | — | 20.0 | — | ||||||||||||
Total assets | $ | 2,472.6 | $ | 433.1 | $ | 2,039.5 | $ | — | ||||||||
Liabilities: | ||||||||||||||||
Forward currency contracts | $ | (9.2 | ) | $ | — | $ | (9.2 | ) | $ | — | ||||||
Contingent value rights | (118.1 | ) | (118.1 | ) | — | — | ||||||||||
Interest rate swaps | (49.6 | ) | — | (49.6 | ) | — | ||||||||||
Other acquisition related contingent consideration | (228.5 | ) | — | — | (228.5 | ) | ||||||||||
Total liabilities | $ | (405.4 | ) | $ | (118.1 | ) | $ | (58.8 | ) | $ | (228.5 | ) | ||||
Balance at December 31, 2012 | Quoted Price in Active Markets for Identical Assets (Level 1) | Significant Other Observable Inputs (Level 2) | Significant Unobservable Inputs (Level 3) | |||||||||||||
Assets: | ||||||||||||||||
Available-for-sale securities | $ | 1,809.9 | $ | 0.3 | $ | 1,809.6 | $ | — | ||||||||
Cash equivalents | 27.0 | — | 27.0 | — | ||||||||||||
Interest rate swaps | 1.7 | — | 1.7 | — | ||||||||||||
Forward currency contracts | 17.8 | — | 17.8 | — | ||||||||||||
Purchased currency options | 2.7 | — | 2.7 | — | ||||||||||||
Total assets | $ | 1,859.1 | $ | 0.3 | $ | 1,858.8 | $ | — | ||||||||
Liabilities: | ||||||||||||||||
Contingent value rights | $ | (277.4 | ) | $ | (277.4 | ) | $ | — | $ | — | ||||||
Written currency options | (5.1 | ) | — | (5.1 | ) | — | ||||||||||
Other acquisition related contingent consideration | (198.1 | ) | — | — | (198.1 | ) | ||||||||||
Total liabilities | $ | (480.6 | ) | $ | (277.4 | ) | $ | (5.1 | ) | $ | (198.1 | ) | ||||