Employee Benefit Plans (Narrative) (Details) (USD $) In Millions, unless otherwise specified	1 Months Ended	3 Months Ended	6 Months Ended
	Feb. 28, 2011	Jun. 30, 2011	Jun. 30, 2011
Restricted stock, vesting period, in years	three
Performance-based restricted stock units	0.5
Percentage of pre-tax earnings paid for profit sharing plan			15.00%
Stock based compensation program expense threshold			$ 10
Profit sharing and related payroll tax expense		$ 90	$ 90
Restricted Shares And Units And Stock Options [Member]
Performance-based restricted stock units	3.0
Performance-Based Restricted Stock Units RSU at the Target Performance Level [Member]
Performance-based restricted stock units	1.9
Performance-Based Restricted Stock Units RSU Based on Return on Invested Capital [Member]
Performance-based restricted stock units	1.2
Performance-Based Restricted Stock Units RSU Based on Merger-Related Goals [Member]
Performance-based restricted stock units	1.8