Share-Based Payments (Details 6) - Cash settled performance units	12 Months Ended
	Dec. 31, 2017 shares
Cash settled performance shares
Beginning Balance, Unvested, Shares	122,000,000
Shares, Hemophilia spin-off adjustment	3,000,000
Shares, Granted	83,000,000	[1]
Shares, Vested	(69,000,000)
Shares, Forfeited	(34,000,000)
Ending Balance, Unvested, Shares	105,000,000

[1] CSPUs granted in 2017 include awards granted in conjunction with our annual awards made in February 2017 and CSPUs granted in conjunction with the hiring of employees. These grants reflect the target number of shares eligible to be earned at the time of grant. CSPUs granted in 2017 also include CSPUs issued in 2017 based upon the attainment of performance criteria set for 2016 in relation to shares granted in 2016.