Employment Benefit Plans Level 3 Rollforward (Details) (Pension Plan, Defined Benefit, USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Ending balance	$ 2,490,000,000	[1]	$ 2,013,000,000	[2]
Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	32,000,000	[2],[3]	130,000,000
Actual return on plan assets still held at reporting date			1,000,000
Actual Return on Plan Assets Sold During Period			3,000,000
Purchases, Sales, and Settlements	(32,000,000)		(102,000,000)
Ending balance	0	[1],[3]	32,000,000	[2],[3]
US Government Agencies Debt Securities [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Ending balance	10,000,000		13,000,000
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance			1,000,000
Actual return on plan assets still held at reporting date			0
Actual Return on Plan Assets Sold During Period			0
Purchases, Sales, and Settlements			(1,000,000)
Ending balance	0	[3]	0	[3]
Real Estate [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Ending balance	0		32,000,000
Real Estate [Member] | Fair Value, Inputs, Level 3 [Member]
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Beginning balance	32,000,000	[3]	129,000,000
Actual return on plan assets still held at reporting date			1,000,000
Actual Return on Plan Assets Sold During Period			3,000,000
Purchases, Sales, and Settlements	(32,000,000)		(101,000,000)
Ending balance	$ 0	[3]	$ 32,000,000	[3]

[1] Excludes less than $1 million accrued for dividend and interest receivable.

[2] Excludes $1 million accrued for dividend and interest receivable.

[3] See Note 2 to the Consolidated Financial Statements under the heading “Fair Value Measurements” for a definition of each of these levels of inputs.