Share-Based Payments (Details 6) - Cash settled performance units	12 Months Ended
	Dec. 31, 2015 shares
Cash settled performance shares
Beginning Balance, Unvested, Shares	335,000,000
Shares, Granted	115,000,000	[1]
Shares, Vested	(222,000,000)
Shares, Forfeited	(36,000,000)
Ending Balance, Unvested, Shares	192,000,000

[1] CSPUs granted in 2015 include approximately 48,000 CSPUs issued in 2015 based upon the attainment of performance criteria set for 2014 in relation to awards granted in 2014. The remainder of the CSPUs granted in 2015 include awards granted in conjunction with our annual awards made in February 2015 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.