Retirement and Other Benefit Programs (Net Periodic Benefit Cost) (Details) - Baxalta $ in Millions	3 Months Ended
	Mar. 31, 2017 USD ($)
U.S. pensions
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$ 3.7
Interest cost	3.9
Expected return on plan assets	(4.0)
Net periodic benefit cost	3.6
International pensions
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	9.4
Interest cost	1.2
Expected return on plan assets	(1.8)
Net periodic benefit cost	8.8
OPEB (U.S.)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	0.3
Interest cost	0.3
Expected return on plan assets	0.0
Net periodic benefit cost	$ 0.6