Share-based Payments Share-Based Payments (Details 7) - Performance units	12 Months Ended
	Dec. 31, 2017 shares
Share-based Compensation Arrangement by Share-based Payment Award
Beginning Balance, Unvested, Shares	110,000,000
Shares, Hemophilia spin-off adjustment	3,000,000
Shares, Granted	40,000,000	[1]
Shares, Vested	(43,000,000)
Shares, Forfeited	(19,000,000)
Ending Balance, Unvested, Shares	91,000,000

[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.