Share-Based Incentive Compensation (details) - Grants after Period (USD $)	0 Months Ended
	Feb. 07, 2012
Stock options [Member]
Grants after period
Stock options granted, number	2,437,433
Stock options granted, weighted average exercise price	$ 59.74
Stock options granted, weighted average grant-date fair value of options granted (per share)	$ 12.08
Common stock awards [Member]
Grants after period
Other equity instruments, granted, number	1,556,874
Other equity instruments, granted, weighted average grant-date fair value (per share)	$ 59.74
Restricted and deferred shares [Member]
Grants after period
Other equity instruments, granted, number	882,764
Performance shares [Member]
Grants after period
Other equity instruments, granted, number	674,110