Commitments and Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014 acre
Commitments And Contingencies 1	99
Commitments And Contingencies 2	370
Commitments And Contingencies 3	85
Commitments And Contingencies 4	754
Commitments And Contingencies 5	1,809
Commitments And Contingencies 6	7,000
Commitments And Contingencies 7	$ 25
Commitments And Contingencies 8	$ 30
Commitments And Contingencies 9	10,000
Commitments And Contingencies 10	1
Commitments And Contingencies 11	673